Meteorological observations and eddy covariance raw data from polygonal tundra in the Lena River Delta, Siberia ...

• Main Authors: Sachs, Torsten, Wille, Christian, Boike, Julia, Kutzbach, Lars
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2008
• Subjects: Arctic Tundra; atmospheric radiation; Eddy Correlation Devices; island; Methane; river delta; Multiple investigations; Arctic; lena river; permafrost; Tundra; Siberia
• Online Access: https://dx.doi.org/10.1594/pangaea.753001; https://doi.pangaea.de/10.1594/PANGAEA.753001

We present the first ecosystem-scale methane flux data from a northern Siberian tundra ecosystem covering the entire snow-free period from spring thaw until initial freeze-back. Eddy covariance measurements of methane emission were carried out from the beginning of June until the end of September in the southern central part of the Lena River Delta (72°22' N, 126°30' E). The study site is located in the zone of continuous permafrost and is characterized by Arctic continental climate with very low precipitation and a mean annual temperature of -14.7°C. We found relatively low fluxes of on average 18.7 mg/m**2/d, which we consider to be because of (1) extremely cold permafrost, (2) substrate limitation of the methanogenic archaea, and (3) a relatively high surface coverage of noninundated, moderately moist areas. Near-surface turbulence as measured by the eddy covariance system in 4 m above the ground surface was identified as the most important control on ecosystem-scale methane emission and explained about ... : Supplement to: Sachs, Torsten; Wille, Christian; Boike, Julia; Kutzbach, Lars (2008): Environmental controls on ecosystem-scale CH4 emission from polygonal tundra in the Lena River Delta, Siberia. Journal of Geophysical Research: Biogeosciences, 113, G00A03 ...