Tropopause height characteristics associated with ozone and stratospheric moistening during intense convective activity over Indian sub-continent
| Autor: | Upal Saha, Rohit Chakraborty, Bijay Kumar Guha, Animesh Maitra |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Convection
Global and Planetary Change Ozone 010504 meteorology & atmospheric sciences Convective transport Humidity 010501 environmental sciences Oceanography Atmospheric sciences 01 natural sciences Ozone depletion chemistry.chemical_compound Deep convection chemistry Climatology Environmental science Tropopause Water vapor 0105 earth and related environmental sciences |
| Zdroj: | Global and Planetary Change. 158:1-12 |
| ISSN: | 0921-8181 |
| DOI: | 10.1016/j.gloplacha.2017.09.009 |
| Popis: | In this present investigation, a threefold analysis has been portrayed to comprehend the atmospheric dynamics at the Tropopause height on both short and long term basis over the Indian sub-continent. The Tropopause height as determined from the gridded temperature profiles from ERA Interim reanalysis is using a concept of “threshold lapse-rate”. It has also been noticed that an exchange between water vapour and ozone occurs along the Tropopause (100 hPa) region during occurrences of deep moist convection. The eastern Indian coastal region experiences enormous convective strength during summer (March–May), hence an increase in specific humidity (as proxy of water vapour) with subsequent decrease in ozone levels in the east-coastal stations are found comparable with the inland stations. Again, the vertical convective transport during deep convection has been found to be supported by stronger vertical wind in the coastal regions compared to inland locations. Finally, it has been comprehended that vertical transport of water vapour gradually decreases in the eastern Indian coastal regions while not much change has been noticed in inland regions. |
| Databáze: | OpenAIRE |
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