TITLE:
GOSAT CH4 and CO2, MODIS Evapotranspiration on the Northern Hemisphere June and July 2009, 2010 and 2011
AUTHORS:
Reginald R. Muskett
KEYWORDS:
GOSAT; CH4 ; CO2; MODIS; Evapotranspiration; Wildfire
JOURNAL NAME:
Atmospheric and Climate Sciences,
Vol.3 No.2,
April
30,
2013
ABSTRACT: The Greenhouse gases Observing Satellite (GOSAT) affords an ability
to assess and monitor CH4 and CO2 near-surface
atmospheric concentrations globally on monthly scales pertaining to
biogeochemical cycles and anthropogenic emissions. In addition to GOSAT our
investigation incorporates global-monthly estimates of evapotranspiration (ET)
from the Moderate Resolution Spectroradiometer (MODIS) and fire/wildfire
locations for correspondence and comparison. We restrict the investigation to
the months of June and July in years 2009, 2010 and 2011. After processing and
assessment on the northern hemisphere we focus on two regions in Eurasia for interrogation: 40? to 80?E by 50? to 58?N and
100? to 140?E by 50? to 58?N. The regions allow for contrasting regional
settings, an agricultural-industrial-urban west-region to a boreal-steppe
discontinuous permafrost zone palsa and thaw lake east-region. Joint
probability density functions allow us to identify significant modes, the
highest probable values of background levels of CH4 and CO2 to ET and develop regressions for correlated relationships. We found that
background levels of CH4, CO2 and ET were not affected by
the wildfires of 2010. Regressions indicate significant inverse relationships
of CH4 and CO2 to ET in the west-region and no
significant relationships in the east-region. The east-region shows
significantly higher background levels of CH4, CO2 and ET
owing to the heterogeneity of ecosystems, hydrology, physical processes and
terrain in the discontinuous permafrost zone of the central Siberian Plateau.