caa a22 4500 475777824 CHVBK 20180406123636.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1002730405170 doi (NATIONALLICENCE)springer-10.1023/A:1002730405170 Marine Boundary-Layer Variability Over The Indian Ocean During Indoex (1998) [Elektronische Daten] [Vijayakumar Manghnani, Sethu Raman, Devdutta Niyogi, Vinayaka Parameswara, John Morrison, S. Ramana, J. Raju] The variability in boundary-layerstructure over the Indian Ocean during a north-eastmonsoon and the factors influencing it areinvestigated. This study was made possible as acomponent of the Indian Ocean Experiment (INDOEX),conducted from February 19 to March 30, 1998. The dataused are, surface-layer mean and turbulencemeasurements of temperature, humidity and wind, andvertical soundings of temperature and humidity.Significant spatio-temporal variability was observedin the boundary-layer structure throughout the cruise.The ITCZ was characterized as the region withstrongest winds and maximum surface turbulent fluxesof momentum and heat. One of the important findingsfrom this study was a strong influence of continentalair masses on the boundary-layer structure in theNorthern Hemisphere, even at a distance of 600 km offthe Indian coast. This was generally evident in theform of an elevated plume of dry continental airbetween altitudes of 1500 m and 2700 m. Advection ofcontinental aerosols in this layer presents potentialfor significant entrainment into shallow clouds inthis region, which eventually feed deeper clouds atthe ITCZ. This finding provides an explanation foranomalous higher aerosol concentrations found duringprevious studies. The structure of the marineboundary layer was influenced by various factors suchas proximity to land, an anomalous warm pool in theocean and the ITCZ. In the southern hemisphere, theboundary-layer height was primarily governed bysurface-layer sensible heat flux and was found to behighest in the vicinity of the ITCZ. North of theequator it was strongly influenced by land-air-seainteractions. In addition to this synoptic modulation,there was also a significant diurnal variability inthe boundary-layer height. Kluwer Academic Publishers, 2000 Indian Ocean nationallicence INDOEX nationallicence ITCZ nationallicence Marine boundary layer nationallicence North-east monsoon nationallicence Manghnani Vijayakumar Department of Marine, Earth and Atmospheric Sciences, NCSU, Box 8208, 27695, Raleigh, NC, U.S.A. aut Raman Sethu Department of Marine, Earth and Atmospheric Sciences, NCSU, Box 8208, 27695, Raleigh, NC, U.S.A. aut Niyogi Devdutta Department of Marine, Earth and Atmospheric Sciences, NCSU, Box 8208, 27695, Raleigh, NC, U.S.A. aut Parameswara Vinayaka Department of Marine, Earth and Atmospheric Sciences, NCSU, Box 8208, 27695, Raleigh, NC, U.S.A. aut Morrison John Department of Marine, Earth and Atmospheric Sciences, NCSU, Box 8208, 27695, Raleigh, NC, U.S.A. aut Ramana S. Space Physics Laboratory, Vikram Sarabhai Space Center, Trivandrum, India aut Raju J. Center for Atmospheric and Ocean Sciences, Indian Institute of Sciences, Bangalore, India aut Boundary-Layer Meteorology Kluwer Academic Publishers 97/3(2000-12-01), 411-430 0006-8314 97:3<411 2000 97 10546 https://doi.org/10.1023/A:1002730405170 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002730405170 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Manghnani Vijayakumar Department of Marine, Earth and Atmospheric Sciences, NCSU, Box 8208, 27695, Raleigh, NC, U.S.A aut NATIONALLICENCE 700 1- Raman Sethu Department of Marine, Earth and Atmospheric Sciences, NCSU, Box 8208, 27695, Raleigh, NC, U.S.A aut NATIONALLICENCE 700 1- Niyogi Devdutta Department of Marine, Earth and Atmospheric Sciences, NCSU, Box 8208, 27695, Raleigh, NC, U.S.A aut NATIONALLICENCE 700 1- Parameswara Vinayaka Department of Marine, Earth and Atmospheric Sciences, NCSU, Box 8208, 27695, Raleigh, NC, U.S.A aut NATIONALLICENCE 700 1- Morrison John Department of Marine, Earth and Atmospheric Sciences, NCSU, Box 8208, 27695, Raleigh, NC, U.S.A aut NATIONALLICENCE 700 1- Ramana S. Space Physics Laboratory, Vikram Sarabhai Space Center, Trivandrum, India aut NATIONALLICENCE 700 1- Raju J. Center for Atmospheric and Ocean Sciences, Indian Institute of Sciences, Bangalore, India aut NATIONALLICENCE 773 0- Boundary-Layer Meteorology Kluwer Academic Publishers 97/3(2000-12-01), 411-430 0006-8314 97:3<411 2000 97 10546 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer