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A Global Tropical Survey of Mid-Tropospheric Cyclones by Kushwaha, Pradeep; Sukhatme, Jai; Nanjundiah, Ravi S. is a scholarly article available to read on EtoBox.

What is A Global Tropical Survey of Mid-Tropospheric Cyclones about?

Mid-Tropospheric Cyclones (MTCs) are moist synoptic systems with distinct mid tropospheric vorticity maxima and weak signatures in the lower troposphere. Composites and statistics of MTCs over the tropics are constructed and compared with monsoon lows and depressions (together, lower troposphere cyclones; LTCs). We begin with South Asia, where tracking reveals that MTCs change character during their life, i.e., their track is composed of MTC and LTC phases. The highest MTC-phase density and least motion is over the Arabian Sea, followed by the Bay of Bengal and South China Sea. A MTC-phase composite shows an east-west tilted warm above deep cold-core temperature anomaly with maximum vorticity at 600 hPa. While the LTC-phase shows a shallow cold-core below 800 hPa and a warm upright temperature anomaly with lower tropospheric vorticity maximum. Apart from South Asia, systems with similar morphology are observed over the west and central Africa, east and west Pacific in boreal summer. In boreal winter, regions that support MTCs include northern Australia, the southern Indian Ocean, and South Africa. Relatively, the MTC fraction is higher equatorward, where there is a cross-equatorial

Author

Kushwaha, Pradeep; Sukhatme, Jai; Nanjundiah, Ravi S.

Published

2020

Language

EN