convective intensification induced by a descending dry layer: a case study of csip iop 9 andrew...
TRANSCRIPT
![Page 1: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/1.jpg)
Convective intensification induced by a descending dry
layer: a case study of CSIP IOP 9
Andrew Russell and Geraint VaughanCentre for Atmospheric Sciences
University of Manchester
![Page 2: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/2.jpg)
1. CSIP – The Convective Storm Initiation Project
![Page 3: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/3.jpg)
CSIP observational campaignwas a collaborative project
United Kingdom
• Universities of:* Reading* Leeds* Manchester* Salford* Bath
• The Met Office• Chilbolton Observatory
Germany
• Institut für Meteorologie und Klimaforschung (IMK), Karlsruhe
• Universität Braunschweig• GeoForschungsZentrum,
Potsdam
Courtesy of Cyril Morcrette
![Page 4: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/4.jpg)
Courtesy of Cyril Morcrette
![Page 5: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/5.jpg)
2. Synoptic Background
![Page 6: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/6.jpg)
1645 UTCRainfall radar
IOP9: 18th July 2005
![Page 7: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/7.jpg)
1645 UTCMSG visible
IOP9: 18th July 2005
![Page 8: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/8.jpg)
1530 UTCCAMRa 3GHz
IOP9: 18th July 2005
![Page 9: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/9.jpg)
MSG visible MSG WV
ECMWF PV TOMS O3
1200 UTC
![Page 10: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/10.jpg)
MSG visible MSG WV
ECMWF PV TOMS O3
1200 UTC
![Page 11: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/11.jpg)
MSG visible MSG WV
ECMWF PV TOMS O3
1200 UTC
![Page 12: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/12.jpg)
MSG visible MSG WV
ECMWF PV TOMS O3
1200 UTC
![Page 13: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/13.jpg)
3. Observations of the dry layer
![Page 14: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/14.jpg)
![Page 15: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/15.jpg)
GPS Water Vapour - Linkenholt
θw (ºC) and 10% Relative Humidity (RH) from
Radiosondes - SwanageSNR from wind profiling radar
– Linkenholt (plotted over Swanage sonde data)
![Page 16: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/16.jpg)
IOP9: 18th July 2005
1645 UTC
![Page 17: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/17.jpg)
LID
θw decreases θw decreases with height…with height…… … instability!instability!
![Page 18: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/18.jpg)
![Page 19: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/19.jpg)
![Page 20: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/20.jpg)
3. How the convection was forced
![Page 21: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/21.jpg)
1600 UTC
![Page 22: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/22.jpg)
MSG visible MSG WV
ECMWF PV TOMS O3
1200 UTC
![Page 23: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/23.jpg)
1200 UTC
ECMWF RH (shading) and T (contours)
![Page 24: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/24.jpg)
1200 UTC
ECMWF PV (shading and contours) and θ (dashed contours)
![Page 25: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/25.jpg)
![Page 26: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/26.jpg)
![Page 27: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/27.jpg)
![Page 28: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/28.jpg)
For more thoughts on the upper-level origin of atmospheric lids, see my poster…
![Page 29: Convective intensification induced by a descending dry layer: a case study of CSIP IOP 9 Andrew Russell and Geraint Vaughan Centre for Atmospheric Sciences](https://reader035.vdocument.in/reader035/viewer/2022062713/56649f495503460f94c6adcf/html5/thumbnails/29.jpg)
4. Conclusions
• Convective showers over southern England behind a cold front
• Dry intrusion overran moist surface layer resulting in potential instability
• Convection capped at 6 km by uppermost dry layer
• Interesting observations of the double descending layer, which had a role in both forcing and inhibiting the convection
Andrew RussellCentre for Atmospheric SciencesUniversity of Manchester
[email protected] www.andrewrussell.co.uk