global variability of mesoscale convective system anvil structure jian yuan jasmine cetrone robert...
Post on 22-Dec-2015
213 views
TRANSCRIPT
![Page 1: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/1.jpg)
Global Variability of Mesoscale Convective System
Anvil StructureJian Yuan
Jasmine Cetrone Robert A. Houze, Jr.
ARM Cloud Modeling Working Group, Princeton, 20 November 2008
![Page 2: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/2.jpg)
ANVILAC
ANVIL
AS
Goal: Global variation of the structure and composition of MCS anvils
![Page 3: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/3.jpg)
Objective Identification of MCSs
Rain Rate: AMSR-E
Aqua L2B Global Swath Rain Rate (AE_Rain).
Horizontal Cloud Structure: MODIS
MODIS/Aqua Clouds 1km and 5km 5-Min L2 Wide Swath Subset along CloudSat V2 at GES DISC(GES_DISC_MAC06S1_v2)
Vertical Cloud Structure: CloudSat & ARM
Products 2B-GEOPROF; 2B-CWC-RO; 2B-FLXHR; …
![Page 4: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/4.jpg)
Identification of High Cloud Features
MODIS Tb11 (K) AMSR/E Rain (mm/h)
COMBINED
CloudElement
Rain Core
FEATURE MASK
![Page 5: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/5.jpg)
Precipitation from deep cloud features
Percentages are contributions of total rainfall from all high cloud systems within each region for the whole 12 months of 2007.
![Page 6: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/6.jpg)
Rain-weighted frequency of cloud featuresby size and coldness of cloud top
of rain area
![Page 7: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/7.jpg)
Identify MCSs: Rain area 2,000-250,000 km2
Mean Tb11 <235 K Rain area with R>10 mm/hr > 200km2
Stratify MCSs Cold: Tb11_min<208 K Warm: 208 Ko<Tb11_min<220 K Subdivide Cold and Warm by size
Selection of Mesoscale Convective Systems
![Page 8: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/8.jpg)
Cold MCS (Smallest 30%)
![Page 9: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/9.jpg)
Warm MCS (Smallest 30%)
![Page 10: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/10.jpg)
Cold MCSs (Biggest 30%)
![Page 11: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/11.jpg)
Warm MCS (Biggest 30%)
![Page 12: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/12.jpg)
Vertical Structure of Anvils
![Page 13: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/13.jpg)
Vertical Structure of Anvils
![Page 14: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/14.jpg)
Compare to ARM Thick Anvil Results
Niamey ARM site
Cetrone & Houze 2009
![Page 15: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/15.jpg)
Reflectivity (dBZ)0 10 20 30 40 50 60
Hei
gh
t (k
m)
0
4
8
12
16
2
6
10
14
Reflectivity (dBZ)0 10 20 30 40 50 60
Reflectivity (dBZ)0 10 20 30 40 50 60
West Africa Maritime Continent Bay of Bengal
TRMM radar observations of convective echoes in MCSs
Cetrone & Houze 2009
![Page 16: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/16.jpg)
OBJECTIVE MODIS/AMSR-E METHODOLOGY CAPTURES TROPICAL MCS CHARACTERISTICS
Cloud tops of MCSs colder over Africa and West Pacific than over East Pacific and tropical Atlantic
Larger MCSs more frequent over ocean
Smaller MCSs more frequent over land
MJO AND South Asian monsoon favor larger, colder MCSs
Etc.
PRELIMINARY CLOUDSAT & ARM SITE RESULTS SHOW ANVIL STRUCTURE FOR OBJECTIVELY IDENTIFIED MCSs
Africa: Stronger echo in deep raining cloud reaches higher altitude with max reflectivity concentrated at lower levels--suggests graupel
West Pacific: Narrow peaked distribution of reflectivity with values increasing downward--suggests diffusion, aggregation processes
Conclusions
![Page 17: Global Variability of Mesoscale Convective System Anvil Structure Jian Yuan Jasmine Cetrone Robert A. Houze, Jr. ARM Cloud Modeling Working Group, Princeton,](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7f5503460f94a63675/html5/thumbnails/17.jpg)
Thank You