The Indian economy is still heavily dependent on the monsoon. Monsoon forecasts have been around for many years, but new factors affecting the monsoon have also been added in recent years, including effects such as El Nio. Now Indian scientists have discovered that Antarctica’s hot and cold conditions are directly related to weak and strong monsoon winds. From this, it is clear that there is a deep relationship between the weather conditions of Antarctica in the monsoon season. This relationship is being told not now but very old.
1.45 lakh years data
Several interchange events between fast and weak monsoon flow events have been identified. According to the report of Weather.com, this relationship has been made based on information of monsoon events obtained from the study of backflow of the last 1.45 lakh years. This study has been done by scientists from Goa’s National Center for Polar and Ocean Research and Goa University’s School of Earth Ocean and Atmospheric Sciences.
Reconstruction of monsoon circulation
The researchers reconstructed the dynamics of the summer monsoon movement from the backflow zone, which was suitable for inferring the climate relationship of the high latitudes of the south. These records were based on reconstructions of backflow hydrology, which can also be identified from the system’s thermodynamics.
Very few such comparisons have happened
The study said that the effects of climate diversity of the high northern latitudes on the summer monsoon of South Asia have been being done for a long time. In this, both instrumental and indirect climate data have been used. But comparatively, only a few studies have attempted to explore the relationship between the high southern latitudes and the South Asian summer monsoon.
Monsoon comes from the south
The South Asian summer monsoon brings a lot of heat and moisture from the equator. A low-pressure area is formed over the Tibetan Plateau and the Northwest Indian Subcontinent due to the heat caused by the Sun’s seasonal position. After crossing the equator, the southeast winds become southwest (summer) monsoon winds, so a strong relationship is expected between the south and the monsoon.
Manish Tewari, Siddhesh Nagoji, and Rahul Mohan of NCPOR Goa and Vikas Kumar of Goa University compared records of summer monsoon variation of 1.25 million years with a reconstruction published in 2003 based on the wind strength of the southwest monsoon over the western Arabian Sea.
Indian Ocean depression
The results of this study have been published in the journal Polar Science. It clearly states that Antarctica’s warm (or cold) conditions in the south are found to be more (or more) equal to the monsoon circulation, and this happens through the equator of the Indian Ocean. Researchers studied sediments in the tropical region of the southwest Indian Ocean to find out the abundance of isotopes of oxygen and carbon there.
From this study, researchers could get information about the monsoon activities of 41.4 thousand years from the last 1.875 lakh years. The researchers’ summer monsoon records appeared to match indirect records of western Arabian-year monsoon air pressures. At the same time, the records of the climate of Antarctica from this old-time till now also appeared to be in sync with the summer monsoon.