1 / 46

Shrinking of Tropical Tropopause Layer during Disturbed conditions over Bay of Bengal with JASMINE Measurements

JASMINE (Webster et al, 2002) In the year- 1999. Joint Air-Sea Monsoon Interaction Experiment Joint venture between US

more
Download Presentation

Shrinking of Tropical Tropopause Layer during Disturbed conditions over Bay of Bengal with JASMINE Measurements

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Shrinking of Tropical Tropopause Layer during Disturbed conditions over Bay of Bengal with JASMINE Measurements

    2. JASMINE (Webster et al, 2002) In the year- 1999

    10. Data (Webster et al, 2002) 10-15 May (STAR 1) & 21-26 May, 1999 (STAR 2) periods Mean and Turbulence parameters Mom and Heat Fluxes Fluxes at 17.7 m height from Sonic Anemometer & Humidity flux at 14.8 m height from IR Hygrometer SST at 0.05 m depth from Sea Snake Sensor, Mean Wind and Mean temperatures at heights 14.8 m from ETL (aspirated Vaisala HMP-235) & at 9.6 m from IMET systems Data received after stringent quality checks by ETL, NOAA group. We independently carried out several quality checks. Upper air measurements of temperature, humidity, wind & temperature Vertical resolution of 30-45 m were from Rawin sondes (NCAR ATD) Frequency: 6-8 per day Total number of profiles= 163 during 4-31 May Number of valid profiles during STAR 1= 41, Number during STAR 2= 32

    11. Synoptic Conditions during the period of Analysis

    18. Various Tropopause Altitudes identification in GPS Radiosonde profiles

    20. Lapse Rate Minimum Altitude (LRMA) Gettelman and Foster (2002)

    21. Tropopause variations during Disturbed and Undisturbed conditions

    32. Average and std dev of CPTA, CPTT, LRMA, TTL Thickness, Theta at LRMA

    34. Do we see any Links between Tropopause layer variations and the Surface parameters during convective conditions? CAPE (Convective Available Potential Energy) is vertical integrated buoyancy Surface Equivalent Potential Temperature, Since the altitude at which convection detrains is constrained by CAPE and ?e at the surface.

    39. What causes “CPTA cooler at lower heights” during Disturbed conditions ?

    43. Possible mechanisms:

More Related