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Identification of Java

upwelling based onstability of water mass

Setiawan, A.1  G.E. Noor, !. "renggono#, !.$. %utri, ".Agustiadi#, &.%riyono#, '.(u), and *.'ang)

1 $ + -entre for !arine and is/eries "ec/nology, Agency for !arine and is/eries $ + , &alitbang 0% nd &ld. t/ l.

Jalan %asir %uti/ 1, Ancol, Ja2arta 1))#3, Indonesia. "el. 456165)7118# E9t. ))3), a9. 456165)71131, E6mail:

agus.setiawan;22p.go.id

$esearc/ Group of

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Background of JUVO "/e J=>< program outlines an effort to measure t/e magnitude and variability of

t/e Java upwelling by deploying a subsurface A-% mooring system at location?135.7@E, 8.@S and a surface buoy system at location ?133@E, 8@S.

• "/e upwelling of t/e Sout/ern coast of

Java is /ypot/esiBed to play a maCor

role in t/e Indian

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Background

Stratification

Differences of oceanographic

parameters:

>Temperature >Pressure>Radiance >Nutrient>Salinity >Density

Stability ofWaterasses

form

Stable

!nstable"ertical mo#ement tofind stable position

causes

inuence

Neutral

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Data

 Year Cruise/Date Instrument Oceanografic Parameters Depth

2008-2009 1(26 Dec – 9 Sept) RBR Temperature, Salinity, Depth 150-400m

2009-2010 2(10 Sept-20 ei) RBR Temperature, Salinity, Depth

2008-2010 26 Dec-20 ei RD! 150 " #urrent(u,$,%) 24-1&0 m

2011-2012 2& 'e-1& an RBR*#TD Temperature, Salinity, Depth 200-500m

2012-2013 26 'e - 22 'e

RBR Temperature, Salinity, Depth 400-650m

 RD! 150 " #urrent(u,$,%) 115-&5m

2013 .pril - 6 Dec

 

RBR Temperature, Salinity, Depth &50-550m

 RD! 150 " #urrent(u,$,%) .$ailale /nly

56,59

Additional data: sea water temperature data from *(-

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Salinity

Temp $%bser#ation & odel'

())*+(),)

Temperature

B"-

&> value 1 9136) s61

decreased to 5 9 136s61In 3386313, upwelling occurred during mid

!ei6AugustFSeptember, indicated by:• decreasing &> value ?from 19136) to

59136• vertical current wit/ speed 1, cmFs

brings isot/erm layer 1o- and iso/aline

layer #).8 psu rise from m to 13m

and 13m, respectively• s/allower !H ?from 3m to #3m

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Temperature

())*+(),)

S/allower !H

was found

?from 3m to#3m

ue to divergence

caused by Sout/

Java -urrent ?SJ- 6

eastward and

Sout/ Euatorial

-urrent ?SE- 6westward

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B"-

Temperature

5,8

7,8

8,8

./0)/

.10*

/

.102/Salinity

(),,I until

6)9 136

s61

 

(),( (),.

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(),(+(),.

=pwelling occurred due to

interaction between t/e

monsoon and I

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B"-   (),.

Salinity

Temperature

1,7 9 136 decreases to 1,) 9 136

#.3

#.3

In 31#, upwelling occurred in June6

September, indicated by:

• decreased &> from 1,79136 to

1,)9 136

• isot/erm 8,#o- and iso/aline

#,3psu rise from 3m to )7m

and )33m, respectively

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"erima2asi/