CONvective TRansport of2Active2Species2in2the2TropicsGuam,2Jan−Feb 2014

CONvective TRansport of2Active2Species2in2the2TropicsGuam,2Jan−Feb 2014

Weather & Climate Science

Ms. Alison RockwellNCAR/Earth Observing Laboratory Education & Outreach Coordinator

Dr. Ross Salawitch University of Maryland CONTRAST Scientist

Dr. Maria NavarroUniversity of Miami CONTRAST Scientist

Flying Laboratory

NSF/NCAR HIAPER Research Aircraft

Flying Laboratory

NSF/NCAR HIAPER Research Aircraft

FA

AM

BA

e-146

MBL -

6 k

m

Intense solar radiation and warm sea surface temperature in the ;YVWPJHS�>LZ[LYU�7HJPÄJ�WYVK\JL�KLLW�JVU]LJ[P]L�JSV\KZ��

Mid-altitude outflow

Low-altitude inflow & outflow

Designed by Alison Rockwell NCAR/EOL

Troposphere

Lower Stratosphere

Net zero radiative heatingAir

descending

Rising warm air lofts chemical compounds

released by marine organisms

NA

SA

Glo

bal H

aw

k

14 -

19 k

m

Warm tropical ocean waters enhance production of ZOVY[�SP]LK�VYNHUPJ�IYVTPUL�HUK�PVKPUL�JVTWV\UKZ�I`�THYPUL�

VYNHUPZTZ��;OLZL�OHSVJHYIVUZ��OHSVNLU�JVU[HPUPUN�VYNHUPJ�JVTWV\UKZ��HYL�[OLU�YLSLHZLK�PU[V�[OL�H[TVZWOLYL�

)Y6�HUK�*S6�YLHJ[��SLHKPUN�[V�Z[YH[VZWOLYPJ� VaVUL��63) depletion

CONTRAST*65]LJ[P]L�;9HUZWVY[�VM�(J[P]L�:WLJPLZ� PU�[OL�;YVWPJZ

.\HT�!!����1HU\HY`������-LIY\HY`�����

TropopauseAir

ascendingN

SF/N

CA

R H

IAPER

5 -

15 k

m Br I IO

Long-lived bromocarbons

BrO

3VUN�SP]LK�JOSVYVÅ\VYVJHYIVUZ���Z\USPNO[���O`KYV_`S��6/���������JOSVYPUL�TVUV_PKL��*S6�

3VUN�SP]LK�IYVTVJHYIVUZ���Z\USPNO[���O`KYV_`S��6/� ��IYVTPUL�TVUV_PKL��)Y6�

:OVY[�SP]LK�IYVTVJHYIVUZ���Z\USPNO[���O`YKV_`S��6/�� IYVTPUL�TVUV_PKL��)Y6��HUK�VY�PVKPUL�TVUV_PKL��06�

Short-lived halocarbons decompose, yielding:

)Y6�HUK�06�YLHJ[�YLTV]PUN�[YVWVZWOLYPJ�VaVUL��63)

High-altitude slow ascent from

outflow

(PY�^P[OPU�JVU]LJ[P]L�JSV\KZ�OHZ�L_[YLTLS`�SV^�VaVUL�� H�\UPX\L�JOLTPJHS�LU]PYVUTLU[�[OH[�^PSS�IL�

Z[\KPLK�PU�KL[HPS�MVY�[OL�MPYZ[�[PTL�

✭Guam

Image courtesy of WikiCommons & the World Ocean Atlas

Why Guam?

Why Guam?

Photo by Adam Sobel

The People of CONTRAST

The People of CONTRAST

The People of CONTRAST

The People of CONTRAST

The People of CONTRAST

The People of CONTRAST

Maria Norrova Instrument: Whole Air Sampler

Venezuela

Why are we studying this?

Impacts of human activity on atmospheric composition

ITCZ: Inter-tropical Convergence Zone rainy region of the tropics

SouthernHemisphere

Northern Hemisphere

Guahan

15º N

10º N

5º N

Guam

Red & Yellow: Aircraft flight track Note aircraft did return to GuamEQ

ITCZ

Aircraft track flown Sat, 8 Feb (yellow) on top of satellite cloud map

Northern Hemisphere

Carbon Monoxide

Hei

ght (

m)

Ozone

Ozone (O3): Compromises air quality & causes global warming Carbon monoxide (CO): Produced by combustion of fossil fuel & biomass burning

Southern HemisphereH

eigh

t (m

)

Ozone (O3) Carbon Monoxide

Ozone (O3): Compromises air quality & causes global warming Carbon monoxide (CO): Produced by combustion of fossil fuel & biomass burning

Small Particles

Hei

ght (

m)

Northern Hemisphere

Small particles: Particularly harmful to babies & elderly

outher

Small particles: Particularly harmful to babies & elderly

NH value

Small Particles

Hei

ght (

m)

Southern Hemisphere

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