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  • An overview of the uses of per- and polyfluoroalkyl ...

    An overview of the uses of per- and polyfluoroalkyl substances (PFAS)† Juliane Glüge * a, Martin Scheringer a, Ian T. Cousins b, Jamie C. DeWitt c, Gretta Goldenman d, Dorte Herzke ef, Rainer Lohmann g, Carla A. Ng h, Xenia Trier i and Zhanyun Wang j a …

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  • What is Hydrology? - USGS.gov

    2 天前 · Estimates of water use in the United States indicate that about 355 billion gallons per day (one thousand million gallons per day, abbreviated Bgal/d) were withdrawn for all uses during 2010. This total has declined about 17 percent since 1980. Fresh groundwater withdrawals (76.0 Bgal/d) during 2010 were 8 percent less than …

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  • Climate change will affect global water availability ...

    2020-6-23 · Both seasonal and annual mean precipitation and evaporation influence patterns of water availability impacting society and ecosystems. Existing global …

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  • Optimization of photovoltaic water pumping systems for ...

    2020-10-27 · The Saharan regions of Algeria, which represent almost 90% of the total area of the country, have severe energy problems due to insufficient or lack of energy access. The sustainable development of those areas must aim at securing and increasing primary production, especially in the agricultural and pastoral sectors. The production itself depends on the supply of water available at …

    Get Price
  • Estimation of sedimentation rate of Tikvesh Reservoir in ...

    2019-7-12 · The objective of this study was to perform a long-term modeling of the sedimentation rate of one of the largest reservoirs in the Republic of Macedonia, i.e., the “Tikvesh” reservoir. The developed mathematical model should serve for detailed analysis of the sedimentation rate in the reservoir over time, and if the obtained results are acceptable, it should be further developed and used in ...

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  • Frontiers

    2021-4-14 · Sand dams, a rainwater harvesting technique, are small dams constructed across ephemeral streams. During the rainy season, water is stored in the sand that accumulates behind the dam. Sand dams provide communities in drylands with water during the dry season via scoop holes, pools, and shallow wells. Whilst many studies portray sand dams as a positive solution to the growing threat of …

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  • Chapter 7. Drainage water disposal - Home

    2021-2-9 · Box 10: Maximum reuse and minimum disposal of drainage water in the Nile Delta, Egypt, based on maintaining favourable salt balance. Monitoring data showed that in 1993-94, 12 500 million m 3 of drainage water were disposed and 3 400 million m 3 …

    Get Price
  • Frontiers

    2019-3-15 · Impervious surface is an important factor for the ecological performance of the built environment, in particular for the water balance. Therefore, the rainwater drainage infrastructure of new housing developments is planned according to the …

    Get Price
  • Decline and depletion rates of oil production: a ...

    2014-1-13 · Decline can be constant (β=0), directly proportional to production rate (β=1) or proportional to a fractional power of the production rate (0<β<1). In decline curve models, it is assumed that production begins to decline at time t 0, with an initial production rate of q 0 and an initial cumulative production of Q 0.

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  • Multitemporal Mapping of Chlorophyll–α in Lake Karla from ...

    2016-5-13 · With the aquatic environments being excessively stressed by human activities, the need for monitoring critical quality parameters continuously and at large spatial scales is greater than ever. Tο this end, the goal of this study was to exploit remote sensing data for water quality estimation towards the development of a long-term monitoring protocol for aquatic systems. High resolution ...

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  • 4 Behavior and Fate of Oil

    Percentage evaporated = 0.165 (percent D)ln(t), (2) ... The evaporation rate is reduced by the lower temperature. The extent of evaporation of the oil is not the same as that of warmer climates and is, in addition, slowed by adsorption to snow or ice. ... NOAA also works in other parts of the world …

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  • Antiseptics and Disinfectants: Activity, Action, and ...

    Introduction. Considerable progress has been made in understanding the mechanisms of the antibacterial action of antiseptics and disinfectants (215, 428, 437).By contrast, studies on their modes of action against fungi (426, 436), viruses (298, 307), and protozoa have been rather sparse.Furthermore, little is known about the means whereby these agents inactivate prions ().

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  • Transient Porosity Resulting from Fluid–Mineral ...

    The rate of fluid–mineral reactions is orders of magnitude faster than solid state reactions in which mass transfer takes place by slow diffusional processes (Dohmen and Milke 2010; Milke et al. 2013) and so some porosity microstructures generated by fluid–mineral reactions may be considerably “more transient” than microstructures ...

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  • The formation of the ocean’s anthropogenic carbon reservoir

    2016-11-3 · The shallow overturning circulation of the oceans transports heat from the tropics to the mid-latitudes. This overturning also influences the uptake and storage of anthropogenic carbon (C ant).We demonstrate this by quantifying the relative importance of ocean thermodynamics, circulation and biogeochemistry in a global biochemistry and circulation model.

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  • Frequently Asked Questions - discoverDEF

    Diesel Exhaust Fluid (DEF) consumption is measured as a ratio of diesel fuel use, normally termed the 'dosing rate' or 'treat rate'. Medium- and heavy-duty vehicles have a dosing rate of 2-3%. This means that if your truck has a fuel efficiency of six miles per gallon and a dosing rate of 3% it will use approximately 1 gallon of DEF every 200 ...

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  • EVERCOOL EC-WC-202 CPU & GPU Water Cooler Kit -

    EVERCOOL EC-WC-202 CPU & GPU Water Cooler Kit. ( 64) Write a Review. OUT OF STOCK. 2800 RPM. Radiator Dim. 95 x 80 x 65mm. Fan Dim. 80 x 80 x 25mm. Fan Noise 27 dBA. Specs. Reviews.

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  • Copernicus Climate Data Store

    Quality assessment. Documentation. ERA5 is the fifth generation ECMWF reanalysis for the global climate and weather for the past 4 to 7 decades. Currently data is available from 1950, split into Climate Data Store entries for 1950-1978 (preliminary back extension) and from 1979 onwards (final release plus timely updates, this page).

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  • (PDF) Evaporative cooling system for storage of fruits and ...

    The storage life of unpackaged fresh tomatoes in evaporative cooler was 11 days from the 4 days storage life under ambient conditions. In combination with sealed but perforated polyethylene bags ...

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  • Quick integrative optimizers for minimizing the error of ...

    2021-1-23 · With a correlation of 0.959, the GP was stronger than other methods. This is while the ANN was found to be more suitable for cause–effect mapping. Alsumaiei applied an ANN to the prediction of the daily rate of E P in hyper-arid climates in Kuwait. With reference to the obtained Nash–Sutcliffe coefficients (varying in [0.405, 0.755]), the ...

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  • State of the UK Climate 2020 - Kendon - 2021 ...

    2021-7-28 · For the UK the period 1991–2020 has been on average 0.3°C warmer than 1981–2010 and 0.9°C warmer than 1961–1990, with warming across all months and countries. For the UK the period 1991–2020 has been on average 6% wetter than 1961–1990 but only 1% wetter than 1981–2010.

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  • An overview of the uses of per- and polyfluoroalkyl ...

    An overview of the uses of per- and polyfluoroalkyl substances (PFAS)† Juliane Glüge * a, Martin Scheringer a, Ian T. Cousins b, Jamie C. DeWitt c, Gretta Goldenman d, Dorte Herzke ef, Rainer Lohmann g, Carla A. Ng h, Xenia Trier i and Zhanyun Wang j a Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, 8092 Zürich, Switzerland.

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  • What is Hydrology? - USGS.gov

    2 天前 · Estimates of water use in the United States indicate that about 355 billion gallons per day (one thousand million gallons per day, abbreviated Bgal/d) were withdrawn for all uses during 2010. This total has declined about 17 percent since 1980. Fresh groundwater withdrawals (76.0 Bgal/d) during 2010 were 8 percent less than during 1980.

    Get Price
  • Climate change will affect global water availability ...

    2020-6-23 · Both seasonal and annual mean precipitation and evaporation influence patterns of water availability impacting society and ecosystems. Existing global …

    Get Price
  • Optimization of photovoltaic water pumping systems for ...

    2020-10-27 · The Saharan regions of Algeria, which represent almost 90% of the total area of the country, have severe energy problems due to insufficient or lack of energy access. The sustainable development of those areas must aim at securing and increasing primary production, especially in the agricultural and pastoral sectors. The production itself depends on the supply of water available at …

    Get Price
  • Estimation of sedimentation rate of Tikvesh Reservoir in ...

    2019-7-12 · The objective of this study was to perform a long-term modeling of the sedimentation rate of one of the largest reservoirs in the Republic of Macedonia, i.e., the “Tikvesh” reservoir. The developed mathematical model should serve for detailed analysis of the sedimentation rate in the reservoir over time, and if the obtained results are acceptable, it should be further developed and used in ...

    Get Price
  • Frontiers

    2021-4-14 · Sand dams, a rainwater harvesting technique, are small dams constructed across ephemeral streams. During the rainy season, water is stored in the sand that accumulates behind the dam. Sand dams provide communities in drylands with water during the dry season via scoop holes, pools, and shallow wells. Whilst many studies portray sand dams as a positive solution to the growing threat of …

    Get Price
  • Chapter 7. Drainage water disposal - Home

    2021-2-9 · Box 10: Maximum reuse and minimum disposal of drainage water in the Nile Delta, Egypt, based on maintaining favourable salt balance. Monitoring data showed that in 1993-94, 12 500 million m 3 of drainage water were disposed and 3 400 million m 3 were officially reused for agriculture (DRI, 1995). The effective reuse was 3 000 million m 3 assuming an LF of 12 percent.

    Get Price
  • Frontiers

    2019-3-15 · Impervious surface is an important factor for the ecological performance of the built environment, in particular for the water balance. Therefore, the rainwater drainage infrastructure of new housing developments is planned according to the expected amount of impervious surface and the resulting surface runoff. Drainage infrastructure could be overwhelmed, however, due to small, …

    Get Price
  • Decline and depletion rates of oil production: a ...

    2014-1-13 · Decline can be constant (β=0), directly proportional to production rate (β=1) or proportional to a fractional power of the production rate (0<β<1). In decline curve models, it is assumed that production begins to decline at time t 0, with an initial production rate of q 0 and an initial cumulative production of Q 0.

    Get Price
  • Multitemporal Mapping of Chlorophyll–α in Lake Karla from ...

    2016-5-13 · With the aquatic environments being excessively stressed by human activities, the need for monitoring critical quality parameters continuously and at large spatial scales is greater than ever. Tο this end, the goal of this study was to exploit remote sensing data for water quality estimation towards the development of a long-term monitoring protocol for aquatic systems. High resolution ...

    Get Price
  • Water, Climate, and Economy in India from 1880 to the ...

    2021-3-1 · The World Bank measures water stress as the withdrawal of fresh water as a percentage of renewable supply. In 2016, levels of stress ranged from 42 percent in India to 105 percent in Pakistan; the levels were considerably lower in the United Kingdom (10), …

    Get Price
  • IBC Tote Specifications: Understanding Costs, Sizes and ...

    IBC tote sizes range from 110 to 550 gallons, with 275 and 330 being the most common. Dimensions are internationally standardized to roughly 45'L x 45'W. Costs range from 180 to 2,000. Learn more IBC specifications, shipping logistics, and compare to …

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  • Generic Protocol for the Verification of Ballast Water ...

    After exposure, medium and 84. -------f Protocol for the Verification of Ballast Water Treatment Technologies September 2010 Version 5.1 organisms were transferred to sterile 16 mL glass tubes for 24 hours incubation at room temperature, after which viability of …

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  • Hydraulic scale modelling of the rating curve for a ...

    2019-2-19 · For all the survey points, 70.8% fell within a distance of 0.2 m from the surface. The 29.2% of the points with errors larger than 0.2 m were mainly located in parts of the model where the required accuracy is not high, i.e., areas were the velocity is low and areas that are not submerged, even during extreme conditions.

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  • Welfare of pigs at slaughter - - 2020 - EFSA Journal ...

    They report that for sternal lying k = 0.019, which is a much lower k-value than for lateral lying (k = 0.046), where the pig is lying ‘square’ on its side with the legs stretched out and without touching another pig. For pigs that have a slaughter weight of 110 kg, k = 0.019 equates to 0.44 m 2 and k = 0…

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  • Exposure to SVOCs from Inhaled Particles: Impact of ...

    2017-4-28 · The exception is the comparison between 0.05 and 0.1 μm particles for SVOCs with log K part of 10, in which case θ Alv for 0.1 μm is slightly higher than θ Alv for 0.05 μm. This may be due to less deposition of 0.1 μm compared to 0.05 μm particles in the head, tracheobronchial, and alveolar regions, resulting in more 0.1 μm particles ...

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  • Re‐evaluation of sodium nitrate (E 251) and potassium ...

    The Panel estimated that, when comparing all sources (food additives, natural presence and contamination), including reduction factors for vegetables, using the same refined exposure methodology (non-brand-loyal consumer scenario for general population), the contribution of nitrates (E 251–E 252) from their use as food additives is less than ...

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  • Predicted and Projected Water Resources Changes in the ...

    2020-1-1 · Mahé, G., and et al. , 2008: Climate and river runoff changes in West and Central Africa: Past variability and prediction of water resources for the 21st century. XIII World Water Congress, Montpellier, France, Internation Water Resouces Association, 13 pp.

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  • Laboratory Safety and Chemical Hygiene Plan - RESEARCH

    A sustainable safety culture in research is built on leadership engagement, hazard awareness, enhanced communication, and behavior changes. The Laboratory Safety and Chemical Hygiene Plan provides information and guidance to help conduct laboratory work safely and in compliance with environmental health and safety regulations and University policy.

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  • A review on commercial-scale high-value products that

    2019-10-8 · The demand for fossil derivate fuels and chemicals has increased, augmenting concerns on climate change, global economic stability, and sustainability on fossil resources. Therefore, the production of fuels and chemicals from alternative and renewable resources has attracted considerable and growing attention. Ethanol is a promising biofuel that can reduce the consumption of gasoline in the ...

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  • Alivisatos Group Publications

    2021-7-31 · For instance, one QD has t c values of 0.5 (0.1) and 2.0 (0.2) s from two different intensity levels, whereas when the levels are combined into only one on state, t c is found to be 7 (1) s. The CPA method is found to be more suitable for studying multilevel emission in QDs than the conventional bin and threshold method.

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  • (PDF) Evaporative cooling system for storage of fruits and ...

    The storage life of unpackaged fresh tomatoes in evaporative cooler was 11 days from the 4 days storage life under ambient conditions. In combination with sealed but perforated polyethylene bags ...

    Get Price
  • WQMCAL version 2 user manual - UNESCO

    For this software we have discretised this domain at 0.1 day-1 steps and the user can adjust the variation of the ratio f=K2/K1, seeing also the corresponding description of the domain of river flow conditions. From this table (not shown here, but included in the programme) one cannot adopt values of f lower than 0.5 or higher than 5.0.

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  • Laboratory Safety Manual - Cornell University

    Laboratory Safety Manual Laboratory Safety Manual Purpose of This Manual The purpose of this manual is to meet the basic regulatory requirements of the OSHA Laboratory Standard for the development of a Chemical Hygiene Plan and to provide laboratories with useful recommendations that can help achieve compliance with the intent of the OSHA Lab Standard.

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  • 100-Year Lower Mississippi Floods in a Global Climate ...

    2018-10-1 · The GCM captures the seasonal cycle of snowpack well, though the winter peak in February is 16 × 10 9 m 3 lower than observed . 3. The precipitation bias, and further model biases (e.g., in evaporation, timing of melt) or missing processes (e.g., irrigation taking water out of the river system), result in biases in Mississippi River discharge.

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  • Water, Climate, and Economy in India from 1880 to the ...

    2021-3-1 · The World Bank measures water stress as the withdrawal of fresh water as a percentage of renewable supply. In 2016, levels of stress ranged from 42 percent in India to 105 percent in Pakistan; the levels were considerably lower in the United Kingdom (10), …

    Get Price
  • FAQs

    2016-5-27 · Step 2: Attach the case fan to the Molex connector. If you're case fan only has a 2/3 pin connector, use a 2/3 pin case fan connector to Molex adapter. The PSU does have a built in fan, but depending on the series, it might not spin without a certain amount of load or reaches a certain temperature. See picture below.

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  • AMT - Development and application of a mass closure PM2.5 ...

    The new online integrated system was first deployed in Shenzhen, China, to measure the PM2.5 composition from 25 September to 30 October 2019. Our results showed that the average PM2.5 concentration in this work was 33 µg m−3, and the measured species reconstructed the PM2.5 well and almost formed a mass closure (94 %).

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  • Re‐evaluation of sodium nitrate (E 251) and potassium ...

    The Panel estimated that, when comparing all sources (food additives, natural presence and contamination), including reduction factors for vegetables, using the same refined exposure methodology (non-brand-loyal consumer scenario for general population), the contribution of nitrates (E 251–E 252) from their use as food additives is less than ...

    Get Price
  • Attribution Analysis of the Ethiopian Drought of 2015 in ...

    2018-3-15 · Top 10-cm soil moisture content anomaly (m 3 m −3) w.r.t. all years, averaged over February–September 2015. View in gallery Soil moisture (0–10 cm) time series for 2011–15 averaged over the box shown in Fig. 1. The thick black line represents the actual soil moisture time series, and the thin dashed line represents the seasonal cycle.

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  • Occupational Exposure to Methylene Chloride

    1991-11-7 · 29 CFR PARTS 1910, 1915 and 1926 [DOCKET NO. H-71] RIN: 1218-AA98. ... high solvency for most industrial contaminants, and a rapid rate of evaporation (Ex. 4-41). ... a lower section with a reservoir containing liquid solvent and a heat source which boils the solvent to create a vapor, and an upper section containing only the vapor and emission ...

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  • Exposure to SVOCs from Inhaled Particles: Impact of ...

    2017-4-28 · The exception is the comparison between 0.05 and 0.1 μm particles for SVOCs with log K part of 10, in which case θ Alv for 0.1 μm is slightly higher than θ Alv for 0.05 μm. This may be due to less deposition of 0.1 μm compared to 0.05 μm particles in the head, tracheobronchial, and alveolar regions, resulting in more 0.1 μm particles ...

    Get Price
  • Copernicus: Sentinel-2 - Satellite Missions - eoPortal ...

    Copernicus: Sentinel-2 — The Optical Imaging Mission for Land Services. Space Segment Launch Mission Status Sensor Complement Ground Segment References. Sentinel-2 is a multispectral operational imaging mission within the GMES (Global Monitoring for Environment and Security) program, jointly implemented by the EC (European Commission) and ESA (European Space Agency) for global …

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  • Aquaculture: global status and trends

    Average annual growth rate of all aquaculture production in terms of quantity over a 5-year period. Calculated using the difference between mean values from the periods 2000–2002 and 2005–2007. Red, greater than −10%; orange, −3 to −10%; rose, 0 to −3%; violet, 0–3%; light blue, 3–10%; dark blue, greater than 10%. Source: FAO ...

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  • Hydraulic scale modelling of the rating curve for a ...

    2019-2-19 · For all the survey points, 70.8% fell within a distance of 0.2 m from the surface. The 29.2% of the points with errors larger than 0.2 m were mainly located in parts of the model where the required accuracy is not high, i.e., areas were the velocity is low and areas that are not submerged, even during extreme conditions.

    Get Price
  • Global COVID-19 infections exceed 19.6 million: JHU

    2020-8-30 · The advance seasonally adjusted insured unemployment rate was 11.6 percent for the week ending July 18, an increase of 0.5 percentage point from the prior week's revised rate, the report showed. The latest data 'confirms that the economy's recovery has lost momentum in recent weeks,' Sarah House, senior economist at Wells Fargo Securities ...

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  • Infectious Disease Transmission in Solid Organ ...

    2018-12-20 · Sexual contact between men is the main route of HIV transmission in Australia, accounting for 70% of all new cases in 2016. 37 Overall incidence of HIV among MSM in Australia was 0.85 per 100 person years in 2016, a rate which had not changed significantly for the prior 6 years. 69 The roll-out of expanded access to PrEP in 2016, however, has ...

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  • Renewable Energy and Electricity - World Nuclear Association

    In 2019 there was about 6.3 GWe of CSP capacity worldwide, according to IRENA, 2.3 GWe (37%) of this in Spain, 1.8 GWe (28%) in the USA, 0.5 GWe in Morocco, and 0.5 GWe in South Africa. World capacity was 5.0 GWe at the end of 2017, when 11.5 TWh was produced (i.e. 26% capacity factor).

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  • IBC Tote Specifications: Understanding Costs, Sizes and ...

    IBC tote sizes range from 110 to 550 gallons, with 275 and 330 being the most common. Dimensions are internationally standardized to roughly 45'L x 45'W. Costs range from 180 to 2,000. Learn more IBC specifications, shipping logistics, and compare to other common containers.

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  • Finally: visualized OCO2 satellite data showing global ...

    2015-10-4 · The e-fold decay rate for the current 110 ppmv extra is a net sink rate of ~2.15 ppmv. That gives an e-fold decay time of ~50 years. The residence time only shows the average time that any CO2 molecule, whatever the source, remains in the atmosphere before swapped with a CO2 molecule from another reservoir.

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