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The Indian Ocean‘s role in GHG variability over India Raghu Murtugudde

The Indian Ocean‘s 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?. Circulation schematic for Southwest Monsoon. Schott 2004.

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The Indian Ocean‘s role in GHG variability over India Raghu Murtugudde

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  1. The Indian Ocean‘s 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?

  2. Circulation schematic for Southwest Monsoon Schott 2004

  3. Circulation schematic for Northeast Monsoon Schott 2004

  4. WOCE sections, arrays deep NL, 2000 Moorings November - April post WOCE not deployed not covered May - October

  5. 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

  6. Net heat (Wm-2)and CO2 (mol/m2/yr) fluxes over Indian Ocan

  7. India obviously has its own season of wildfires but what about contributions from other regions even when India’s wildfires are at their minimum?

  8. The proposed array May not capture the hotspots of interest for GHGs.

  9. 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.

  10. 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)

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