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Details:

Personal Author:

Vollmer, M. K. ; Muhle, J. ; Trudinger, C. M. ; Rigby, M. ; Montzka, S. A. ; ... More ▼

Description:

We report ground-based atmospheric measurements and emission estimates for the halons H-1211 (CBrClF2), H-1301 (CBrF3), and H-2402 (CBrF2CBrF2) from the AGAGE (Advanced Global Atmospheric Gases Experiment) and the National Oceanic and Atmospheric Administration global networks. We also include results from archived air samples in canisters and from polar firn in both hemispheres, thereby deriving an atmospheric record of nearly nine decades (1930s to present). All three halons were absent from the atmosphere until approximate to 1970, when their atmospheric burdens started to increase rapidly. In recent years H-1211 and H-2402 mole fractions have been declining, but H-1301 has continued to grow. High-frequency observations show continuing emissions of H-1211 and H-1301 near most AGAGE sites. For H-2402 the only emissions detected were derived from the region surrounding the Sea of Japan/East Sea. Based on our observations, we derive global emissions using two different inversion approaches. Emissions for H-1211 declined from a peak of 11ktyr(-1) (late 1990s) to 3.9ktyr(-1) at the end of our record (mean of 2013-2015), for H-1301 from 5.4ktyr(-1) (late 1980s) to 1.6ktyr(-1), and for H-2402 from 1.8ktyr(-1) (late 1980s) to 0.38ktyr(-1). Yearly summed halon emissions have decreased substantially; nevertheless, since 2000 they have accounted for approximate to 30% of the emissions of all major anthropogenic ozone depletion substances, when weighted by ozone depletion potentials.

DOI:

http://dx.doi.org/10.1002/2015jd024488

Document Type:

Journal Article

Main Document Checksum:

[+]

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Surrogate gas prediction model as a proxy for Delta C-14-based measurements of fossil fuel CO2

Personal Author:

Coakley, K. J. ; Miller, J. B. ; ...

Published Date:

2016

Source:

Journal of Geophysical Research-Atmospheres, 121(12), 7489-7505.

Description:

The measured C-14:C-12 isotopic ratio of atmospheric CO2 (and its associated derived Delta C-14 value) is an ideal tracer for determination of the fos...

File Type:

[PDF - 1.76 MB]

File Type:

[PDF - 1.76 MB]
Strong regional atmospheric C-14 signature of respired CO2 observed from a tall tower over the midwestern United States

Personal Author:

LaFranchi, B. W. ; McFarlane, K. J. ; ...

Published Date:

2016

Source:

Journal of Geophysical Research-Biogeosciences, 121(8), 2275-2295.

Description:

Radiocarbon in CO2 ((CO2)-C-14) measurements can aid in discriminating between fast (< 1 year) and slower (> 5-10 years) cycling of C between the atmo...

File Type:

[PDF - 2.28 MB]

File Type:

[PDF - 2.28 MB]
A multiyear estimate of methane fluxes in Alaska from CARVE atmospheric observations

Personal Author:

Miller, S. M. ; Miller, C. E. ; ...

Published Date:

2016

Source:

Global Biogeochemical Cycles, 30(10), 1441-1453.

Description:

Methane (CH4) fluxes from Alaska and other arctic regions may be sensitive to thawing permafrost and future climate change, but estimates of both curr...

File Type:

[PDF - 2.74 MB]

File Type:

[PDF - 2.74 MB]
Mesoscale modulation of air-sea CO2 flux in Drake Passage

Personal Author:

Song, H. ; Marshall, J. ; ...

Published Date:

2016

Source:

Journal of Geophysical Research-Oceans, 121(9), 6635-6649.

Description:

We investigate the role of mesoscale eddies in modulating air-sea CO2 flux and associated biogeochemical fields in Drake Passage using in situ observa...

File Type:

[PDF - 4.06 MB]

File Type:

[PDF - 4.06 MB]
Continuous and high-precision atmospheric concentration measurements of COS, CO2, CO and H2O using a quantum cascade laser spectrometer (QCLS)

Personal Author:

Kooijmans, L. M. J. ; Uitslag, N. A. M. ; ...

Published Date:

2016

Source:

Atmospheric Measurement Techniques, 9(11), 5293-5314.

Description:

Carbonyl sulfide (COS) has been suggested as a useful tracer for gross primary production as it is taken up by plants in a similar way as CO2. To expl...

File Type:

[PDF - 5.11 MB]

File Type:

[PDF - 5.11 MB]
UTLS water vapour from SCIAMACHY limb measurements V3.01 (2002-2012)

Personal Author:

Weigel, K. ; Rozanov, A. ; ...

Published Date:

2016

Source:

Atmospheric Measurement Techniques, 9(1), 133-158.

Description:

The SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) aboard the Envisat satellite provided measurements from August 2...

File Type:

[PDF - 6.13 MB]

File Type:

[PDF - 6.13 MB]
Influence of oil and gas emissions on summertime ozone in the Colorado Northern Front Range

Personal Author:

McDuffie, E. E. ; Edwards, P. M. ; ...

Published Date:

2016

Source:

Journal of Geophysical Research-Atmospheres, 121(14), 8712-8729.

Description:

Tropospheric O-3 has been decreasing across much of the eastern U.S. but has remained steady or even increased in some western regions. Recent increas...

File Type:

[PDF - 1.41 MB]

File Type:

[PDF - 1.41 MB]
Summertime surface O-3 behavior and deposition to tundra in the Alaskan Arctic

Personal Author:

Van Dam, B. ; Helmig, D. ; ...

Published Date:

2016

Source:

Journal of Geophysical Research-Atmospheres, 121(13), 8055-8066.

Description:

Atmospheric turbulence quantities, boundary layer ozone (O-3) levels, and O-3 deposition to the tundra surface were investigated at Toolik Lake, AK, d...

File Type:

[PDF - 2.83 MB]

File Type:

[PDF - 2.83 MB]
A comprehensive estimate for loss of atmospheric carbon tetrachloride (CCl4) to the ocean

Personal Author:

Butler, J. H. ; Yvon-Lewis, S. A. ; ...

Published Date:

2016

Source:

Atmospheric Chemistry and Physics, 16(17), 10899-10910.

Description:

Extensive undersaturations of carbon tetrachloride (CCl4) in Pacific, Atlantic, and Southern Ocean surface waters indicate that atmospheric CCl4 is co...

File Type:

[PDF - 2.61 MB]

File Type:

[PDF - 2.61 MB]
MIPAS IMK/IAA CFC-11 (CCl3F) and CFC-12 (CCl2F2) measurements: accuracy, precision and long-term stability

Personal Author:

Eckert, E. ; Laeng, A. ; ...

Published Date:

2016

Source:

Atmospheric Measurement Techniques, 9(7), 3355-3389.

Description:

Profiles of CFC-11 (CCl3F) and CFC-12 (CCl2F2) of the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) aboard the European satellite ...

File Type:

[PDF - 12.56 MB]

File Type:

[PDF - 12.56 MB]
Recent divergences in stratospheric water vapor measurements by frost point hygrometers and the Aura Microwave Limb Sounder

Personal Author:

Hurst, D. F. ; Read, W. G. ; ...

Published Date:

2016

Source:

Atmospheric Measurement Techniques, 9(9), 4447-4457.

Description:

Balloon-borne frost point hygrometers (FPs) and the Aura Microwave Limb Sounder (MLS) provide high-quality vertical profile measurements of water vapo...

File Type:

[PDF - 2.10 MB]

File Type:

[PDF - 2.10 MB]
The influence of daily meteorology on boreal fire emissions and regional trace gas variability

Personal Author:

Wiggins, E. B. ; Veraverbeke, S. ; ...

Published Date:

2016

Source:

Journal of Geophysical Research-Biogeosciences, 121(11), 2793-2810.

Description:

Relationships between boreal wildfire emissions and day-to-day variations in meteorological variables are complex and have important implications for ...

File Type:

[PDF - 2.44 MB]

File Type:

[PDF - 2.44 MB]
Separation of biospheric and fossil fuel fluxes of CO2 by atmospheric inversion of CO2 and (CO2)-C-14 measurements: Observation System Simulations

Personal Author:

Basu, S. ; Miller, J. B. ; ...

Published Date:

2016

Source:

Atmospheric Chemistry and Physics, 16(9), 5665-5683.

Description:

National annual total CO2 emissions from combustion of fossil fuels are likely known to within 5-10aEuro-% for most developed countries. However, unce...

File Type:

[PDF - 6.92 MB]

File Type:

[PDF - 6.92 MB]
Investigating Alaskan methane and carbon dioxide fluxes using measurements from the CARVE tower

Personal Author:

Karion, A. ; Sweeney, C. ; ...

Published Date:

2016

Source:

Atmospheric Chemistry and Physics, 16(8), 5383-5398.

Description:

Northern high-latitude carbon sources and sinks, including those resulting from degrading permafrost, are thought to be sensitive to the rapidly warmi...

File Type:

[PDF - 3.56 MB]

File Type:

[PDF - 3.56 MB]
Regional atmospheric CO2 inversion reveals seasonal and geographic differences in Amazon net biome exchange

Personal Author:

Alden, C. B. ; Miller, J. B. ; ...

Published Date:

2016

Source:

Global Change Biology, 22(10), 3427-3443.

Description:

Understanding tropical rainforest carbon exchange and its response to heat and drought is critical for quantifying the effects of climate change on tr...

File Type:

[PDF - 1.22 MB]

File Type:

[PDF - 1.22 MB]
New approaches to quantifying aerosol influence on the cloud radiative effect

Personal Author:

Feingold, G. ; McComiskey, A. ; ...

Published Date:

2016

Source:

Proceedings of the National Academy of Sciences of the United States of America, 113(21), 5812-5819.

Description:

The topic of cloud radiative forcing associated with the atmospheric aerosol has been the focus of intense scrutiny for decades. The enormity of the p...

File Type:

[PDF - 1006.31 KB]

File Type:

[PDF - 1006.31 KB]
No significant increase in long-term CH4 emissions on North Slope of Alaska despite significant increase in air temperature

Personal Author:

Sweeney, C. ; Dlugokencky, E. ; ...

Published Date:

2016

Source:

Geophysical Research Letters, 43(12), 6604-6611.

Description:

Continuous measurements of atmospheric methane (CH4) mole fractions measured by NOAA's Global Greenhouse Gas Reference Network in Barrow, AK (BRW), sh...

File Type:

[PDF - 536.86 KB]

File Type:

[PDF - 536.86 KB]
Detecting regional patterns of changing CO2 flux in Alaska

Personal Author:

Parazoo, N. C. ; Commane, R. ; ...

Published Date:

2016

Source:

Proceedings of the National Academy of Sciences of the United States of America, 113(28), 7733-7738.

Description:

With rapid changes in climate and the seasonal amplitude of carbon dioxide (CO2) in the Arctic, it is critical that we detect and quantify the underly...

File Type:

[PDF - 1.21 MB]

File Type:

[PDF - 1.21 MB]
Evaluation of wetland methane emissions across North America using atmospheric data and inverse modeling

Personal Author:

Miller, S. M. ; Commane, R. ; ...

Published Date:

2016

Source:

Biogeosciences, 13(4), 1329-1339.

Description:

Existing estimates of methane (CH4) fluxes from North American wetlands vary widely in both magnitude and distribution. In light of these differences,...

File Type:

[PDF - 1.66 MB]

File Type:

[PDF - 1.66 MB]
O-3, CH4, CO2, CO, NO2 and NMHC aircraft measurements in the Uinta Basin oil and gas region under low and high ozone conditions in winter 2012 and 2013

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