SSS climatology from SSS climatology from TAO-PIRATA moored buoysTAO-PIRATA moored buoys

Specifications :Specifications :

Network of 105 moored buoys with TSG Network of 105 moored buoys with TSG measurement :measurement :

Pacific Ocean Pacific Ocean TAO/TRITONTAO/TRITON

Atlantic Ocean Atlantic Ocean PIRATA PIRATA

Indian OceanIndian Ocean

We process data from January 2000 to January 2008We process data from January 2000 to January 2008 Measurements of conductivity each 10 minutesMeasurements of conductivity each 10 minutes

Time scale available : 1 hour, daily, 5-days, monthly, Time scale available : 1 hour, daily, 5-days, monthly, quarterlyquarterly

SSS measured at 1m ( more than 85% ) and at 2m.SSS measured at 1m ( more than 85% ) and at 2m.

Quality indicesQuality indices 4 levels depending of results of pre and post-deployment 4 levels depending of results of pre and post-deployment

calibrationscalibrations

1 - 1 - Highest QualityHighest Quality. Pre/post-deployment calibrations agree to . Pre/post-deployment calibrations agree to within sensor specifications. In most cases, only pre-within sensor specifications. In most cases, only pre-deployment calibrations have been applied.deployment calibrations have been applied.

2 - 2 - Default QualityDefault Quality. Pre-deployment calibrations only or post-. Pre-deployment calibrations only or post-deployment calibrations only applied. Default value for deployment calibrations only applied. Default value for sensors presently deployedsensors presently deployed and for sensors which were not and for sensors which were not recovered or not calibratable when recovered, or for which recovered or not calibratable when recovered, or for which pre-deployment calibrations have been determined to be pre-deployment calibrations have been determined to be invalid.invalid.

3 - 3 - Adjusted DataAdjusted Data. Pre/post calibrations differ, or original data . Pre/post calibrations differ, or original data do not agree with other data sources (e.g., other in situ do not agree with other data sources (e.g., other in situ data or climatology), or original data are noisy. data or climatology), or original data are noisy. Data have Data have been adjusted in an attempt to reduce the error.been adjusted in an attempt to reduce the error.

4 - 4 - Lower QualityLower Quality. Pre/post calibrations differ, or data do not . Pre/post calibrations differ, or data do not agree with other data sources (e.g., other in situ data or agree with other data sources (e.g., other in situ data or climatology), or data are noisy. Data could not be climatology), or data are noisy. Data could not be confidently adjusted to correct for error.confidently adjusted to correct for error.

Problem : with quality indices equals to 2, Problem : with quality indices equals to 2, we don’t know if data are correct or notwe don’t know if data are correct or not

So which data should be kept and which So which data should be kept and which ones should be removed ?ones should be removed ?

Data availabilityData availability

Verification of availability and quality indices for Verification of availability and quality indices for monthy SSS data for all the buoys from January monthy SSS data for all the buoys from January 2000 and January 2008.2000 and January 2008.

Distinction between two cases :Distinction between two cases :

when we kept only data with quality indices when we kept only data with quality indices equal to 1 and 3 (Good and adjusted data)equal to 1 and 3 (Good and adjusted data)

when we kept all data (except quality when we kept all data (except quality indices equal to 4)indices equal to 4)

Months corresponding to an El-Nino events are Months corresponding to an El-Nino events are removed of the study.removed of the study.

May 2002

April 2003

August 2006

February 2007

Results for selected moored buoysResults for selected moored buoys For the buoy located at 5N, 147E, data are only available for daily mean. For the buoy located at 5N, 147E, data are only available for daily mean. Availability (without El-Nino Months) : less than 1 year, Availability (without El-Nino Months) : less than 1 year, more than 1 more than 1

yearyear, , more than 2 yearsmore than 2 years, , more than 3 yearsmore than 3 years, , more than 4 yearsmore than 4 years, , more more than 5 yearsthan 5 years, ,

LatitudeLatitude LongitudLongitudee

Total Time Period Avaliable (months)Total Time Period Avaliable (months)

With quality indices With quality indices equal to 1 and 3 equal to 1 and 3 With all dataWith all data

Atlantic Atlantic OceanOcean

00 -10-10 1010 4848

1212 -38-38 3232 5252

-10-10 -10-10 7777 9797

Pacific Pacific OceanOcean

-5-5 156156 00 5555

-2-2 -180-180 3030 6161

00 -170-170 4444 6565

88 165165 5353 6666

00 -155-155 5454 7676

-5-5 -95-95 6262 7676

Buoys with SSS measured at Buoys with SSS measured at 1m1m : on 83 : on 83 buoys, 32 have a data availability less than buoys, 32 have a data availability less than one yearone year

Results for others buoys Results for others buoys (without El-Nino Months)(without El-Nino Months)

latitude longitude

Nb of months with good and ajusted data

(Quality = 1 and 3)

Nb of Months available (Quality

=1, 2 and 3) latitude longitude

Nb of months with good and ajusted data

(Quality = 1 and 3)

Nb of Months available (Quality

=1, 2 and 3)

12 -23 11 12 2 -180 40 54-8 -30 0 25 2 -140 22 55

-19 -34 0 29 0 156 0 56-14 -32 0 29 -8 -180 39 580 0 25 45 -8 165 39 578 -38 27 48 -8 -95 47 57-6 -10 20 51 2 -95 33 590 -35 18 54 8 -95 47 59

15 -38 26 70 0 -125 35 604 -38 47 75 -5 -180 40 600 -23 61 89 5 -95 35 61

-8 67 0 13 -5 -140 45 614 90 0 13 0 -140 54 668 90 0 15 -2 156 0 68

0 90 16 22 0 -110 56 69

2 -125 3 12 0 165 62 693,5 -95 11 12 5 156 0 728 -125 0 16 5 165 62 74

12 -95 13 16 -2 165 64 75-8 -125 5 18 2 165 70 755 -125 11 20 5 -140 54 76

10 -95 26 30 -5 165 75 765 -180 21 36 0 -180 68 80-2 -95 31 50 2 156 0 79-2 -140 44 50 9 -140 68 79

0 -95 37 53

TA

O-P

acific

TA

O-P

acific

entre janvier 2000 et janvier 2008 entre janvier 2000 et janvier 2008

PIR

AT

AT

AO

-Indie

n

More than 1 yearMore than 1 year

More than 2 yearsMore than 2 years

More than 3 yearsMore than 3 years

More than 4 yearsMore than 4 years

More than 5 yearsMore than 5 years

Results for others buoys:Results for others buoys: Buoys with SSS measured at Buoys with SSS measured at 2m2m:all data :all data

have quality indices equal to 2:have quality indices equal to 2:

latitude longitudewithout El-Nino events

5 130 02 130 188 130 395 137 43-5 95 440 147 49

-1,5 90 518 137 525 147 548 156 592 147 652 137 67

More than 1 yearMore than 1 year

More than 2 yearsMore than 2 years

More than 3 yearsMore than 3 years

More than 4 yearsMore than 4 years

More than 5 yearsMore than 5 years

Selected Buoys represented by diamonds

Note:Note:

Climatologic plot are available on TAO-PIRATA Climatologic plot are available on TAO-PIRATA website :website :

http://www.pmel.noaa.gov/tao/disdel/disdel.htmlhttp://www.pmel.noaa.gov/tao/disdel/disdel.html

This climatology is computed from the World Ocean Database This climatology is computed from the World Ocean Database 2005 (data from CTD, drifters, TSG …)2005 (data from CTD, drifters, TSG …)

We can plot : 1°) for each month, a Latitude-Longitude map:We can plot : 1°) for each month, a Latitude-Longitude map:

2°) for different latitude, a Time-Longitude section and for 2°) for different latitude, a Time-Longitude section and for different longitude, a Latitude-Time section:different longitude, a Latitude-Time section:

3°) for different latitude, a Depth-Longitude section and for 3°) for different latitude, a Depth-Longitude section and for different longitude, a Latitude-Depth section:different longitude, a Latitude-Depth section:

ConclusionConclusion kept good and adjusted data (quality kept good and adjusted data (quality

indices equal to 1 and 3) from all the indices equal to 1 and 3) from all the sites with a data availability of 4 years sites with a data availability of 4 years and more (13 sites)and more (13 sites)

For each site, create a climatology all For each site, create a climatology all the 5-days, framed by maximum and the 5-days, framed by maximum and minimum measured in the 5 daysminimum measured in the 5 days

L1c files available for simulation in L1c files available for simulation in Full Pol and Dual Pol on the same Full Pol and Dual Pol on the same area :area :

AlgovalPlan AlgovalPlan

Study area:Study area:

4161 gridpoints4161 gridpoints

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