Kein Folientitel

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• The Indian Oceans role in GHG variability over
  India
• Raghu Murtugudde
• ESSIC-DAOS, University of Maryland
• College Park, MD 20742
• Can we ignore the Indian Ocean while measuring
  the Greenhouse Gases over the Indian
  subcontinent?

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Circulation schematic for Southwest Monsoon
Schott 2004
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Circulation schematic for Northeast Monsoon
Schott 2004
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WOCE sections, arrays
deep
NL, 2000
Moorings
November - April
post WOCE
not deployed
May - October
not covered
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• Surface drifter currents for both monsoon seasons
• 180 WOCE drifters 1992-95
• 350 TOGA/ENSO drifters since 1995
• WE CAN USE DRIFTERS TO MEASURE GHG FLUXES FROM
  THE OCEAN

SW Monsoon
SEC
NE monsoon
SECC
Courtesy P. Niiler
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Net heat (Wm-2) and CO2 (mol/m2/yr) fluxes over
Indian Ocan
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India obviously has its own season of wildfires
but what about contributions from other regions
even when Indias wildfires are at their minimum?
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The proposed array May not capture the hotspots
of interest for GHGs.
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Indian Ocean Zonal mode ensemble pattern Wind
stress and SST
Peak (SON)
Courtesy H. Annamalai
It may or may not be a dipole at all but when the
eastern Indian Ocean cools, there are impacts on
the Indian Monsoons.
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Tropical cyclone days for Dec-Apr
Climatological mean of number of cyclone days
(contours)difference between deep and shallow
mixed layer (shading)
(Xie et al., 2002)