Low permafrost methane emissions from regional airborne flux measurements
Large uncertainties still exist in the global methane budget with clear disagreements between bottom-up and top-down estimates, limiting confidence in climate projections. This is particularly true in the Arctic, which is warming rapidly while storing vast amounts of organic carbon that could potent...
Main Authors: | , , , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
http://www.icop2016.org/index.html
2016
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/43164/ http://www.icop2016.org/index.html https://hdl.handle.net/10013/epic.49663 |
id |
ftawi:oai:epic.awi.de:43164 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:43164 2024-09-15T18:25:03+00:00 Low permafrost methane emissions from regional airborne flux measurements Sachs, Torsten Serafimovic, Andrei Metzger, Stefan Kohnert, Katrin Hartmann, Jörg 2016-06-20 https://epic.awi.de/id/eprint/43164/ http://www.icop2016.org/index.html https://hdl.handle.net/10013/epic.49663 unknown http://www.icop2016.org/index.html Sachs, T. , Serafimovic, A. , Metzger, S. , Kohnert, K. and Hartmann, J. (2016) Low permafrost methane emissions from regional airborne flux measurements , International Converence on Permafrost, Potsdam, 20 June 2016 - 24 June 2016 . hdl:10013/epic.49663 EPIC3International Converence on Permafrost, Potsdam, 2016-06-20-2016-06-24Potsdam, http://www.icop2016.org/index.html Conference notRev 2016 ftawi 2024-06-24T04:16:35Z Large uncertainties still exist in the global methane budget with clear disagreements between bottom-up and top-down estimates, limiting confidence in climate projections. This is particularly true in the Arctic, which is warming rapidly while storing vast amounts of organic carbon that could potentially be released as carbon dioxide and methane, adding a new greenhouse gas source of unknown magnitude. Regional scale methane emission estimates and functional relationships between potential drivers and methane fluxes are currently unavailable. The Airborne Measurements of Methane Fluxes (AIRMETH) campaigns are designed to quantitatively and spatially explicitly address this question. While ground-based eddy covariance (EC) measurements provide continuous in-situ observations of the surface-atmosphere exchange of energy and matter, they are rare in the Arctic permafrost zone and site selection is bound by logistical constraints among others. Consequently, these observations cover only small areas that are not necessarily representative of the region of interest. Airborne measurements can overcome this limitation by covering distances of hundreds of kilometers over time periods of a few hours. During the AIRMETH-2012 campaign aboard the research aircraft POLAR 5 we measured turbulent exchange fluxes of energy and methane along thousands of kilometers covering the North Slope of Alaska. Time-frequency (wavelet) analysis, footprint modeling, and machine learning techniques are used to extract spatially resolved turbulence statistics and fluxes, spatially resolved contributions of land cover and biophysical surface properties to each flux observation, as well as regionally valid functional relationships between environmental drivers and observed fluxes that can explain spatial flux patterns and – if available in temporal resolution – allow for spatio-temporal scaling of the observations. Here we present a 100 m resolution gridded methane flux map for the North Slope of Alaska, covering about 90.000 km2. We show that ... Conference Object north slope permafrost Alaska Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Large uncertainties still exist in the global methane budget with clear disagreements between bottom-up and top-down estimates, limiting confidence in climate projections. This is particularly true in the Arctic, which is warming rapidly while storing vast amounts of organic carbon that could potentially be released as carbon dioxide and methane, adding a new greenhouse gas source of unknown magnitude. Regional scale methane emission estimates and functional relationships between potential drivers and methane fluxes are currently unavailable. The Airborne Measurements of Methane Fluxes (AIRMETH) campaigns are designed to quantitatively and spatially explicitly address this question. While ground-based eddy covariance (EC) measurements provide continuous in-situ observations of the surface-atmosphere exchange of energy and matter, they are rare in the Arctic permafrost zone and site selection is bound by logistical constraints among others. Consequently, these observations cover only small areas that are not necessarily representative of the region of interest. Airborne measurements can overcome this limitation by covering distances of hundreds of kilometers over time periods of a few hours. During the AIRMETH-2012 campaign aboard the research aircraft POLAR 5 we measured turbulent exchange fluxes of energy and methane along thousands of kilometers covering the North Slope of Alaska. Time-frequency (wavelet) analysis, footprint modeling, and machine learning techniques are used to extract spatially resolved turbulence statistics and fluxes, spatially resolved contributions of land cover and biophysical surface properties to each flux observation, as well as regionally valid functional relationships between environmental drivers and observed fluxes that can explain spatial flux patterns and – if available in temporal resolution – allow for spatio-temporal scaling of the observations. Here we present a 100 m resolution gridded methane flux map for the North Slope of Alaska, covering about 90.000 km2. We show that ... |
format |
Conference Object |
author |
Sachs, Torsten Serafimovic, Andrei Metzger, Stefan Kohnert, Katrin Hartmann, Jörg |
spellingShingle |
Sachs, Torsten Serafimovic, Andrei Metzger, Stefan Kohnert, Katrin Hartmann, Jörg Low permafrost methane emissions from regional airborne flux measurements |
author_facet |
Sachs, Torsten Serafimovic, Andrei Metzger, Stefan Kohnert, Katrin Hartmann, Jörg |
author_sort |
Sachs, Torsten |
title |
Low permafrost methane emissions from regional airborne flux measurements |
title_short |
Low permafrost methane emissions from regional airborne flux measurements |
title_full |
Low permafrost methane emissions from regional airborne flux measurements |
title_fullStr |
Low permafrost methane emissions from regional airborne flux measurements |
title_full_unstemmed |
Low permafrost methane emissions from regional airborne flux measurements |
title_sort |
low permafrost methane emissions from regional airborne flux measurements |
publisher |
http://www.icop2016.org/index.html |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/43164/ http://www.icop2016.org/index.html https://hdl.handle.net/10013/epic.49663 |
genre |
north slope permafrost Alaska |
genre_facet |
north slope permafrost Alaska |
op_source |
EPIC3International Converence on Permafrost, Potsdam, 2016-06-20-2016-06-24Potsdam, http://www.icop2016.org/index.html |
op_relation |
Sachs, T. , Serafimovic, A. , Metzger, S. , Kohnert, K. and Hartmann, J. (2016) Low permafrost methane emissions from regional airborne flux measurements , International Converence on Permafrost, Potsdam, 20 June 2016 - 24 June 2016 . hdl:10013/epic.49663 |
_version_ |
1810465469092593664 |