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Proceedings Paper

Analysis and evaluation of Observing System Simulation Experiments (OSSEs) forecast data for Indian summer monsoon
Author(s): Medha Deshpande; P. Mukhopadhyay; Michiko Masutani; Zaizhong Ma; Lars Peter Riishojgaard; Michael Hardesty; Dave Emmitt; T. N. Krishnamurti; B. N. Goswami
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Paper Abstract

An attempt is made here to evaluate the skill of forecast during boreal summer monsoon regime over the Indian region using the Observation Simulation System Experiment (OSSE) with Doppler Wind LIDAR (DWL) onboard International Space Station (ISS), assimilated in the initial condition. Through various techniques such as pattern correlation, root mean square error etc, we found that there is some positive impact of assimilating the DWL data on the forecast particularly at the lower tropospheric level. Impact on lowering the RMSE is seen for wind fields in the 850 and 500 hPa over Indian domain but not much impact is seen over larger domain. The moisture field and cloud also show marginal impact due to assimilation of DWL. This indicates that possibly due to lower spatial resolution of DWL data and more data gap over Indian and surrounding oceanic region, the impact on forecast is less. However, it shows the promise that monsoon being a convectively coupled system; increase in spatial data by DWL may better resolve the low level wind and subsequently the low level shear which is important for convection trigger in boundary layer.

Paper Details

Date Published: 3 May 2016
PDF: 14 pages
Proc. SPIE 9882, Remote Sensing and Modeling of the Atmosphere, Oceans, and Interactions VI, 98821P (3 May 2016); doi: 10.1117/12.2223656
Show Author Affiliations
Medha Deshpande, Indian Institute of Tropical Meteorology (India)
P. Mukhopadhyay, Indian Institute of Tropical Meteorology (India)
Michiko Masutani, National Oceanic and Atmospheric Administration (United States)
Zaizhong Ma, National Oceanic and Atmospheric Administration (United States)
Lars Peter Riishojgaard, Joint Ctr. for Satellite Data Assimilation (United States)
Michael Hardesty, National Oceanic and Atmospheric Administration (United States)
Dave Emmitt, Simpson Weather Associates, Inc. (United States)
T. N. Krishnamurti, Florida State Univ. (United States)
B. N. Goswami, Indian Institute of Science Education and Research Pune (India)


Published in SPIE Proceedings Vol. 9882:
Remote Sensing and Modeling of the Atmosphere, Oceans, and Interactions VI
Tiruvalam N. Krishnamurti; Madhavan Nair Rajeevan, Editor(s)

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