MERMAID: Chl and IOPs
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1 MERMAID: Chl and IOPs Kathryn Barker 1, C. Mazeran 2, C. Lerebourg 2 1 ARGANS Ltd, UK. 2 ACRI-ST, France
2 MERMAID catalogue Chla and IOP definitions have been fixed; Other parameters also. MERMAID columns standardised for new website facility METADATA FIELD Site PI Lat_IS Lon_IS TIME_IS PQC MQC Theta_s RADIOMETRY FIELD Rho_wn_IS_* Rho_wn_ISME_* Lw_IS_* LwN_IS_* Exact wavelength Inherent Optical Properties FIELD a_is_* ap_is_* adet_is_* aph_is_* ag_is_* b_is_* bs_is bp_is_* bb_is_* bbs Apparent Optical Properties FIELD PAR_IS_* PARz1%_IS KPAR_IS Kd_IS_* Kd490_IS NON-OPTICAL MEASUREMENTS Chlorophyll-a FIELD HPLC_chla_TOTAL_IS HPLC_chla_ONLY_IS SPECT_chla_IS Fluor_chla_IS AERONET_Chla_IS Other water constituents FIELD TSM_IS OSM_IS MSM_IS POC_IS ATMOSPHERIC PARAMETERS FIELD TIME_IS_1 AOT_IS_1_* alphanir_is_1 TIME_IS_2 AOT_IS_2_* alphanir_is_2 AOT870
3 Chlorophyll-a: MVT definitions status Definitions remain as last MVT and MQWG. MERIS Chl1 and Chl2 validation has been conducted as follows: API1 (Chl1): OC4ME (developed with HPLC_Chla_TOTAL in-situ measurements) API2 (Chl2): C2RNN HPLC_Chla_TOTAL (sum of HPLC chla + phaeopigments) API1 HPLC_Chla_ONLY (HPLC_chl-a_ONLY) API2 SPEC_Chla TBD; (Should equal API1 and API2 when API1 = API) When API1 API2, PIs need to justify if they measure API1 and/or API2. Fluorometric not considered at this stage. HPLC* Spectrophotometry Fluorometry API 1 BOUSSOLE CASES PortCoast PnB PnB,, MAREL API2 Algarve REPHY MUMM NW Baltic Sea
4 Chlorophyll-a NON-OPTICAL MEASUREMENTS Chlorophyll-a HPLC_chla_TOTAL_IS HPLC_chla_ONLY_IS SPECT_chla_IS Fluor_chla_IS AERONET_Chla_IS mg m -3 mg m -3 mg m -3 mg m -3 mg m -3 Total Chla derived from HPLC pigment analysis. Sum of HPLC chla, div. chla, Chla only derived from HPLC pigment analysis Spectrophotometric chla. Calibrated fluorometric chla (check Chlorophyll-a computed in the AERONET-OC processor from chlide-a + PI to specify which protocols for SeaPRISM radiances. phaeopigments MERIS Chla calibration) Equivalent to MERIS API1 product Equivalent to MERIS API2 product product it is equivalent to. Algarve BOUSSOLE CASES PortCoast Plumes and Blooms Algarve MUMM REPHY Wadden Sea Algarve Bristol Channel and Irish Sea NW Baltic Sea (SYKE stations) MAREL Plumes and Blooms (SYKE transect) AAOT Abu Al-Bukhoosh COVE SeaPRISM Gloria Gustav-Dahlen Tower Helsinki Lighthouse LISCO LJCO MVCO Palgrunden WAVE_CIS
5 Chl-a matchups: Status at last MVT (Lisbon, Nov11) 11 Sites with Chl-a matchups Mix of measurement types - Chl1 & Chl2 definitions Starting point.. CHL 1: #matchups = 361 R 2 = CHL 2: #matchups = 371 R 2 = 0.556
6 Chlorophyll-a: Example validation with HPLC CHL 1 vs HPLC_Total: #matchups = 185 R 2 = CHL 2 vs HPLC_only: #matchups = 79 R 2 = 0.374
7 Chlorophyll-a: Example validation with spectrophotometry CHL 1 vs SPECTROPHOTOMETRY: #matchups = 11 R 2 = CHL 2 vs SPECTROPHOTOMETRY: #matchups = 11 R 2 = 0.748
8 2. IOPs
9 IOPs: MERMAID definitions and sites a_is_* ap_is_* adet_is _* Inherent Optical Properties aph_is_* ag_is_* b_is_* bs_is bp_is_* bb_is_* bbs m -1 m -1 m -1 m -1 m -1 m -1 m -1 m -1 m -1 m -1 Total absorption Total Total Total algal In-situ Total Scattering Total Total Backscattering coefficient at lambda (*) particulate absorption detrital absorptio pigment absorption at measured Coloured Scattering spectral at lambda slope particulate scattering backscattering spectral (incl. a w, NASA protocols) at lambda (*) n at lambda (*) lambda (*) Dissolved Organic Matter (Yellow substance), at (*) (phytoplan kton + detritus) at lambda (*) at lambda (*) slope a = aw+ag+ap ap = aph+adet aph = apadet lambda (*) ag = a-aw-ap b = bw +bp bb = bbw+bbp ap = a-aw-ag PnB PnB PnB CASES Br. Ch_Ir. Sea CASES PnB (a g 443) WaddenSea PnB
10 Chla and IOP Protocols First draft written: Chla and IOPs together Not as extensive detailed summary is sufficient. Data definition to be clear at submission PIs should separate the TOTAL_Chl-a from Chl-a_ONLY; Justify choice. General document organisation: 1. Introduction 2. HPLC Total 3. HPLC Chla only 4. Spectrophotometry 5. Fluorometry 6. AERONET-OC 7. IOPs (better in Optical Protocols?) 8. AOPs (better in Optical Protocols?)
11 Chla and IOP Summary: Processed SITE PI Chla IOPs Conc.s Other AERONET-OC Various Chl-a Algarve J. Icely Chl-a (3 kinds) (pending clarifications) (to come) Br. Chan./Ir. Sea D. McKee Chl-a a g MSM, OSM BOUSSOLE D. Antoine Chl-a (2 types) Cali. Current M. Kahru Chl-a Kd, PAR, KPAR CASES S. Belanger Chl-a a g (443), a ph TSM Kd MAREL C. Belin Chl-a REPHY C. Belin Chl-a MUMM K. Ruddick Chl-a TSM J. Werdell Chl-a (2 types) a, a p, a det, b b, Kd, KPAR NW Baltic S. Kratzer Chl-a PnB D. Siegel Chl-a (2 types) a p, a det, a ph, a g, b b PortCoast V. Brotas Chl-a WaddenSea A. Hommersom Chl-a a g TSM
12 Chla and IOP Summary: Received and in processing SITE PI Chla IOPs Conc.s Comments BIO- OPT_EUROFLEETS (x3) (Black Sea) G. Zibordi, J-F Berthon, E. Canuti HPLC_Chla_ TOTAL_IS Algarve J. Icely a p, a ph, a g, YSBPA Helgoland R. Doerffer HPLC_Chla_ TOTAL_IS IMOS (CSIRO, Australian Coast) BATS HOTS V. Brando/L. Clementson HPLC_Chla_ TOTAL_IS HPLC_Chla_ TOTAL_IS HPLC_Chla_ TOTAL_IS VALHYBIO C. Dupuoy HPLC_Chla_ TOTAL_IS BalticSea H. Siegel, IOW Chl-a (HPLC & Fluor) a, a d, a ph, TSM Kd also a ph, a d, a g b b, a p a p, a d, a ph, a g, TSM, ISM, OSM (Chl) <2002 for IOPs Awaiting metadata updates PI input necessary
13 Conclusions Definitions for MERMAID fixed and revised in database; - Validation plots can be generated by methodology Flag needed for the new parameters (optical flags only at present); e.g. a) Under what conditions is chl-a measured by non-hplc means best compared to API1 and API2? - S. Kratzer s work in the Baltic Sea concludes: SPEC_chla = HPLC_Chla_ONLY = API2 - This may only be true for the Baltic Sea at the measurement date. b) Method variation (e.g. spectrophotometry approach). c) Water types (IOPs, c.f Arnold s presentation) d) Suggestions for flags to aid interpretation welcome. Protocols to be documented
14 [End]
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