Report on Atlantic area

Experts meeting Paris, France 3 sept 2014

REPORT ON ATLANTIC AREA

With IFREMER, RIHMI-WDC, IHPT and IEO contributions

Experts meeting – Paris 3 sept 2014

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• Data received in two separated sets – Data collected by MARIS robot (8 757 CDIs)• 8 489 stations of vertical profiles, 268 time

series– Additional Spanish data which were not available

when the robot run (2 780 CDIs, vertical profiles)

DATA INVENTORY (1)

Potential duplicates!

Experts meeting – Paris 3 sept 2014

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DATA INVENTORY (2)

EDMO Code

Name Country Nb of CDIs

353 IEO Spain 5 518

486 IFREMER France 2 358

590 IHPT Portugal 1 143

612 IMR Norway 11

681 RIHMI Russian Federation

2 507

Total 11 537

Experts meeting – Paris 3 sept 2014

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• Unit conversion and aggregation• Deletion of empty stations (No measurements on all

levels for the parameter)• Deletion of empty lines in a station : some levels with

no measurements for the parameter• Deletion of lines with negative depth• Search for duplicates (linked to the 2 distinct datasets)• QC using ODV– Search for out of range values with Flag = 1– Set a QC for all measurements with Flag=0– Set default values with Flag=0 or Flag=1 to Flag=9

• Write a report on QC and send results to data providers

QUALITY CHECKS

Experts meeting – Paris 3 sept 2014

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• Nitrate and Nitrite• Ammonium• Phosphate• Silicate

NUTRIENTS PARAMETERS

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Parameters Nb stations

Nb measureme

ntsNTRI+NTRA (µmol/l)

1539 7973

NTRI (µmol/l) 5781 35748NTRA (µmol/l) 5663 43531NTAW (µmol/kg) 78 998NTIW (µmol/kg) 78 826Nitrite (µg/l) 146 1109Nitrate (µg/l) 78 225Total 10268 90140

NO2 – NO3 DATA, BEFORE QC (1)• 10 268 vertical profiles, received as

Experts meeting – Paris 3 sept 2014

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• Output parameter for product = – NOx = Nitrite+Nitrate [µmol/l]

• Assumptions– When only Nitrate available assumption that it

is Nitrate+Nitrite– When only Nitrite measurements : data not kept

• Conversions– Conversion from µmol/kg µmol/l:

• using ODV conversion Any µmol/kg to Any µmol/l

– Conversions from µg/l µmol/l: • NO2+NO3/14.00670

NO2 – NO3 DATA, BEFORE QC (2)

Experts meeting – Paris 3 sept 2014

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NO2-NO3 DATA, AFTER QC (1)• 7 272 vertical profiles

Experts meeting – Paris 3 sept 2014

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NO2-NO3 BEFORE AND AFTER QC

Experts meeting – Paris 3 sept 2014

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NO2 – NO3 DATA, AFTER QC (2)• 7 272 vertical profiles

Flag value NOx (Nitrate+Nitri

te)[µmol/l]

0 (No QC) 01 (Good) 46 188

3 (Doubtful) 2224 (Bad) 251

5 (Changed) 56 (below detection

limit)924

Total 47 590

3 detection limits• 0.24 µmol/l• 0.5• 0.7

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NOX DISTRIBUTION

Experts meeting – Paris 3 sept 2014

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Parameters Nb stations

Nb measureme

ntsAMON (µmol/l) 5 255 27 511AMOW (µmol/kg) 77 783Ammonium (µg/l)

1 20

Total 5 333 28 314

AMMONIUM DATA, BEFORE QC (1)• 5 333 vertical profiles, received as•

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• Output parameter for product = –Ammonium [µmol/l]

• Conversions– Conversion from µmol/kg µmol/l:• using ODV conversion Any µmol/kg

to Any µmol/l– Conversion from µg/l µmol/l: • Ammonium/14.00670 assuming it

is N µg/l

AMMONIUM DATA, BEFORE QC (2)

Experts meeting – Paris 3 sept 2014

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AMMONIUM DATA, AFTER QC (1)• 4 994 vertical profiles

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AMMONIUM BEFORE AND AFTER QC

Experts meeting – Paris 3 sept 2014

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AMMONIUM DATA, AFTER QC (2)• 4 994vertical profiles

Flag value AMON[µmol/l]

0 (No QC) 01 (Good) 23 119

3 (Doubtful) 974 (Bad) 507

6 (below detection limit)

2 223

Total 25 946

3 detection limits• 0.7 µmol/l• 0.96• 1.0

Experts meeting – Paris 3 sept 2014

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AMON DISTRIBUTION

Experts meeting – Paris 3 sept 2014

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Parameters Nb stations

Nb measureme

ntsPHOS (µmol/l) 6 594 40 196PHOW (µmol/kg) 78 998Phosphate (µg/l) 2501 38328Total 9 173 79 522

PHOSPHATE DATA, BEFORE QC (1)• 9173 vertical profiles, received as

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• Output parameter for product – Phosphate [µmol/l]

• Conversions– Conversion from µmol/kg µmol/l:• using ODV conversion Any µmol/kg

to Any µmol/l– Conversion from µg/l: • Phosphate/30.97376 assuming it is

P in µg/l

PHOSPHATE DATA, BEFORE QC (2)

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PHOSPHATE DATA, AFTER QC (1)• 8 832 vertical profiles

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PHOSPHATE BEFORE AND AFTER QC

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PHOSPHATE DATA, AFTER QC (2)• 8 832 vertical profiles

Flag value PHOS[µmol/l]

0 (No QC) 01 (Good) 76 170

3 (Doubtful) 884 (Bad) 307

6 (below detection limit)

361

Total 26 143

3 detection limits• 0.03 µmol/l• 0.07• 0.2

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PHOS DISTRIBUTION

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Parameters Nb stations

Nb measureme

ntsSLCA (µmol/l) 7 195 49 950SLCW (µmol/kg) 78 992Silicate (µg/l) 338 3 932Total 7 611 54 874

SILICATE DATA, BEFORE QC (1)• 7 611 vertical profiles, received as

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• Output parameter for product – Silicate [µmol/l]

• Conversions– Conversion from µmol/kg µmol/l:• using ODV conversion Any µmol/kg

to Any µmol/l– Conversion from µg/l µmol/l : • Silicate/28.08550 assuming it is Si

in µg/l

SILICATE DATA, BEFORE QC (2)

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SILICATE DATA, AFTER QC (1)• 7 071 vertical profiles

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SILICATE BEFORE AND AFTER QC

Experts meeting – Paris 3 sept 2014

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SILICATE DATA, AFTER QC (2)• 7 071 vertical profiles

Flag value SLCA[µmol/l]

0 (No QC) 01 (Good) 48 251

3 (Doubtful) 6394 (Bad) 1 246

6 (below detection limit)

47

Total 50 183

2 detection limits• 0.1 µmol/l• 0.3

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SLCA DISTRIBUTION

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• Data coverage: for Ammonium, Silicate, Nitrate– What is a « reasonable » coverage for a product?– How to make the mask? New topography or

masked area?

• Data with QF=6 (value below detection): how to deel with? – put value to limit– put value to 0

• How to deal with estuaries?

DIVA PRODUCTS – PROBLEMS FACED