Skip all navigation and jump to content Jump to site navigation
NASA Logo - Goddard Space Flight Center

+ NASA Homepage

    
Goddard Space Flight Center
About MODIS News Data Tools /images2 Science Team Science Team Science Team

   + Home
ABOUT MODIS
MODIS Publications Link
MODIS Presentations Link
MODIS Biographies Link
MODIS Science Team Meetings Link
 

 

 

Alton, PB; Bodin, PE (2011). Model Estimates of the Land and Ocean Contributions to Biospheric Carbon and Water Fluxes Using MODIS Satellite Data. JOURNAL OF CLIMATE, 24(14), 3558-3574.

Abstract
Land and ocean are often treated separately in modeling studies despite their close links through the carbon, water, and energy cycles. However, biospheric models, particularly when used in conjunction with recent satellite datasets, provide a new, fully coupled, global perspective. The current investigation uses a new version of the Grid Enabled Integrated Earth system (GENIE-SF) to compare both the magnitude and the seasonal and zonal variation in water flux [evaporation E and precipitation (PPT)] and carbon flux [net primary productivity (NPP)] above land and ocean. GENIE-SF contains state-of-the-art representations of photosynthesis and is driven by the phenological cycles of leaf area index (LAI) and marine chlorophyll concentration, both recorded with the Moderate Resolution Imaging Spectroradiometer (MODIS) satellite sensors. The current study reveals the striking uniformity of the ocean-atmosphere carbon and water flux exchange, both temporally and spatially, compared to the corresponding land-atmosphere exchange. Although biospheric annual NPP (108 +/- 27 GtC yr(-1)) is split almost equally between land (52% +/- 9%) and ocean (48% +/- 9%), the oceanic contribution to biospheric annual E exceeds that of the land by a factor of 6.7 +/- 1.7. Simulations conducted over a 50-yr period (1951-2000) suggest that a 16% increase in land NPP, owing mainly to CO(2) fertilization, may be partially offset by a decline in marine productivity.

DOI:
0894-8755

ISSN:
10.1175/2011JCLI3957.1

FirstGov logo Privacy Policy and Important Notices NASA logo

Curator: Brandon Maccherone
NASA Official: Shannell Frazier

NASA Home Page Goddard Space Flight Center Home Page