Preprint Article Version 1 NOT YET PEER-REVIEWED

A Satellite View of the Atmospheric Dry Intrusion and its Influences on the Mid-Latitude Disastrous Weather

  1. National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China
  2. Nanjing University of Information Science & Technology, Nanjing 210044, China
Version 1 : Received: 17 September 2016 / Approved: 18 September 2016 / Online: 18 September 2016 (10:27:56 CEST)

A peer-reviewed article of this Preprint also exists.

Shou, Y.-X.; Lu, F.; Shou, S. Satellite Assessments of Tropopause Dry Intrusions Correlated to Mid-Latitude Storms. Atmosphere 2016, 7, 128. Shou, Y.-X.; Lu, F.; Shou, S. Satellite Assessments of Tropopause Dry Intrusions Correlated to Mid-Latitude Storms. Atmosphere 2016, 7, 128.

Journal reference: Atmosphere 2016, 7, 128
DOI: 10.3390/atmos7100128

Abstract

Dry intrusion is an important mid-latitude atmosphere phenomenon within the upper troposphere and lower stratosphere. It is always found to be related to the cyclogenesis, rainstorm, as well as convection generation and precipitation enhancement. Since the atmosphere environment for any of these above-mentioned weather is terribly complicated, those preexisting popular schemes which takes no account of water vapor may not suitable for detecting the dry intrusion related to these weathers. With regard to the merits and demerits of the current preexisting schemes, a new scheme based on Fengyun-2E geo-stationary satellite data is presented in this study to detect the atmospheric dry intrusion. The scheme is set up based on the statistical relationship between water vapor at high level troposphere, the general moist potential vorticity, ozone concentration and upper-level jet. After using the total amount of ozone and ozone profile operational products retrieved by Fengyun-3 Polar Orbiting Meteorological Satellites and the potential vorticity calculated by ECMWF Interim data for validation, this scheme is applied to analyze two typical middle-latitude weather processes. One is the famous Beijing extreme rainfall of 21 July 2012 and the other is a hailstorm occurred on the eastern China during March 19, 2014. A good application effect in both cases suggests that our new method of detecting dry intrusion is feasible and can be helpful in middle-latitude disastrous weather monitoring and forecasting.

Subject Areas

dry intrusion; Stratosphere-troposphere exchange; mid-latitude; satellite

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