Indian scientists reveal new layer of monsoon circulation’s link to Antarctica
   Date :28-Dec-2021

Indian scientists _1
IDENTIFYING several occurrences of interchanging intense and weak monsoon circulation events during the 145 kyr period (roughly a millennia), Indian scientists have found that warm/cold conditions in Antarctica show a near one-to-one coupling with weak/strong monsoon phases, suggesting a strong mechanistic link between them during the period. Four scientists from National Centre for Polar and Ocean Research (NCPOR), Goa, under the Ministry of Earth Sciences, and the School of Earth, Ocean and Atmospheric Sciences, Goa University, reconstructed the dynamics of the summer monsoon circulation from an upstream region, which is ideally suited for exploring its link with the southern high-latitude climate.
The available records of past summer monsoon variability are predominantly based on reconstruction of downstream hydrology, which is identifiable with the thermodynamics of the system. “The influence of northern high latitude climate variability on the South Asian Summer Monsoon has been extensively studied using both instrumental and proxy based climate data. In comparison, only a few studies have attempted to explore the southern high latitude association of the South Asian Summer Monsoon,” the study said. South Asian summer monsoon transports large amount of heat and moisture across the equator. A low-pressure system develops over the northwest Indian subcontinent and the Tibetan plateau as a result of sensible heating due to the seasonal position of the Sun. South-easterlies become southwest (summer) monsoon wind, therefore, a strong correlation between them is expected.