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Characteristics of diabatic heating associated with mesoscale convective systems over Indian Ocean from radiosonde and GPS radio occultation
Febrina K.a, Hadi T.W.a, Noersomadib
a Weather and Climate Prediction Laboratory, Faculty of Earth Science and Technology, Institut Teknologi Bandung, Indonesia
b Center of Atmospheric Sciences and Technology, National Institute of Aeronautics and Space, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© Published under licence by IOP Publishing Ltd.This study aims to investigate the characteristics of diabatic heating profiles associated with appearances of Mesoscale Convective Systems (MCSs) over Sumatra Island (SI) and Indian Ocean (IO) including the transitional offshore zone (TZ). We define the parameters of eccentricity, cloud lifetime, and cloud coverage from Multi-Functional Transport Satellite (MTSAT) infrared imageries to identify the MCSs. We derive the diabatic heating profiles over SI and IO using radiosonde data collected during Cooperative Indian Ocean Experiment on Intraseasonal Variability in the Year 2011 (CINDY2011) / Dynamics of the Madden Julian Oscillation (DYNAMO) campaign. We also estimate the diabatic heating profiles from the GPS Radio Occultation incorporated with the European Centre for Medium-Range Weather Forecasts (ECMWF) reanalysis data over TZ, where the radiosonde observations were limited. The results show that heating occurred throughout the entire troposphere during the mature stages of MCSs with more variations in the amplitude and maximum heating up to 20 K/day overland. Furthermore, the altitude of maximum heating over SI is lower than that of IO and TZ. Over SI and TZ, profiles of dissipations (postmature) stage are characterized by cooling in the lower altitude and an upward shift of maximum heating. By analyzing vertical velocity profiles, we confirm that cooling (heating) processes are associated with updraft (downdraft) in the cloud systems. In addition, the presence of cooling that occurs in layers close to the surface could indicate the formation of cold pool during the dissipation phase of the MCSs.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]European centre for medium-range weather forecasts,GPS radio occultations,Indian ocean experiments,Intraseasonal variability,Madden-Julian oscillation,Mesoscale Convective System,Radiosonde observations,Vertical velocity profiles[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1088/1755-1315/162/1/012014[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]