1
CONVECTIVE INDICES FOR THE CONVECTIVE INDICES FOR THE CENTRAL AND WESTERN CENTRAL AND WESTERN TROPICAL PACIFICTROPICAL PACIFICCapt Matt Stratton (Mar 06) Advisors: P. Harr and R. ElsberrySponsor: Air Force Weather, Thesis Topic # 58Beneficiary: 17 OWS, Hickam AFB, HI
This thesis determined the indices that best predicted initiation of deep convection in the tropical Pacific at 5 island locations (ROAH, PGUM, PKWA, PHLI, HTO) for a specific season.
(500) (850,500)SSI T T
TT CT VT
(850) (500)VT T T
LRH
MRH
( ) ( ln )EL
SFC d v vLFC
CAPE R T T d p ( ) (ln )
LFCSFC d v v
SFCCIN R T T d p
(850) (500)dCT T T
NEG LFC SFCDPTH Z Z
POS EL LFCDPTH Z Z
[ (850) (500)] (850) [ (700) (700)]KI T T Td T Td
(500) ( ,500)SFCLI T T SFC
( )
SFCSFC
EL LFC
CAPENCAPE
Z Z
LMSHR
LSPD
SWEAT
HTEMP
LTEMP
PKWA -- KI vs. Julian Date
-70
-50
-30
-10
10
30
50
1 31 61 91 121 151 181 211 241 271 301 331 361
Julian Date
KI
(° C
)
None DayNone NightCP DayCP NightTS DayTS Night
34
34
0.24
Predictors18 Indicescalculatedfrom rawinsondes
Predictands1) Surface weather observations2) NRL blended rainrate data
