DIAGNOSTIC MODELING OF OCEANIC BIOGEOCHEMICAL FLUXES USING A GENERAL OCEAN TURBULENCE MODEL (GOTM) AND TIME-SERIES TRACER MEASUREMENTS
This work addressed the ocean biogeochemical context of two climate-relevant gases: carbon dioxide (CO2) and dimethylsulfide (DMS). We combined time-series measurements and a model of ocean physics to conduct two diagnostic modeling studies. The objective of the first case study was to estimate gros...
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ftpennstate:OAI:PSUETD:ETD-5843 2023-05-15T13:36:40+02:00 DIAGNOSTIC MODELING OF OCEANIC BIOGEOCHEMICAL FLUXES USING A GENERAL OCEAN TURBULENCE MODEL (GOTM) AND TIME-SERIES TRACER MEASUREMENTS Herrmann, Maria Raymond G. Najjar Eugene E. Clothiaux Michael E. Mann David F. Hill 2010-12-18 application/pdf http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-5843/index.html en eng Penn State WorldWide Copyright information available at source archive http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-5843/index.html Meteorology text 2010 ftpennstate 2011-09-13T08:57:56Z This work addressed the ocean biogeochemical context of two climate-relevant gases: carbon dioxide (CO2) and dimethylsulfide (DMS). We combined time-series measurements and a model of ocean physics to conduct two diagnostic modeling studies. The objective of the first case study was to estimate gross biological DMS production rates in the coastal Southern Ocean, west of the Antarctic Peninsula, near Palmer Station. A combination of field measurements from the 20052006 DMS sampling season and a physical model of ocean mixing were combined into a diagnostic model of DMS production. The average DMS production rate in the water column was estimated at 3.3 0.5 nM d-1. When diagnosed production rates were normalized by DMSP concentrations, we found a strong similarity between our estimates and the results obtained by others in a contrasting biogeochemical environment, the North Atlantic subtropical gyre. We, therefore, propose that the average DMSP to DMS conversion rate might be independent of the biogeochemical environment and place our estimate at 0.07 0.01 (nM DMS d-1)/(nM DMSP). In the second case study, hydrographic and biogeochemical field measurements from the 19961998 sampling seasons at the European Station for Time-series in the Ocean, Canary Islands (ESTOC) were used together with a physical model of ocean mixing to diagnose net biological fluxes of nutrients, oxygen, and carbon. On the annual basis ESTOC appeared to be close to metabolic balance, with interannual fluctuations between net autotrophy and net heterotrophy. Our results suggest that export production at the site is indistinguishable from zero. Text Antarc* Antarctic Antarctic Peninsula North Atlantic Southern Ocean PennState: Electronic Theses and Dissertations (eTD) Antarctic Antarctic Peninsula Palmer Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Palmer-Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
PennState: Electronic Theses and Dissertations (eTD) |
op_collection_id |
ftpennstate |
language |
English |
topic |
Meteorology |
spellingShingle |
Meteorology Herrmann, Maria DIAGNOSTIC MODELING OF OCEANIC BIOGEOCHEMICAL FLUXES USING A GENERAL OCEAN TURBULENCE MODEL (GOTM) AND TIME-SERIES TRACER MEASUREMENTS |
topic_facet |
Meteorology |
description |
This work addressed the ocean biogeochemical context of two climate-relevant gases: carbon dioxide (CO2) and dimethylsulfide (DMS). We combined time-series measurements and a model of ocean physics to conduct two diagnostic modeling studies. The objective of the first case study was to estimate gross biological DMS production rates in the coastal Southern Ocean, west of the Antarctic Peninsula, near Palmer Station. A combination of field measurements from the 20052006 DMS sampling season and a physical model of ocean mixing were combined into a diagnostic model of DMS production. The average DMS production rate in the water column was estimated at 3.3 0.5 nM d-1. When diagnosed production rates were normalized by DMSP concentrations, we found a strong similarity between our estimates and the results obtained by others in a contrasting biogeochemical environment, the North Atlantic subtropical gyre. We, therefore, propose that the average DMSP to DMS conversion rate might be independent of the biogeochemical environment and place our estimate at 0.07 0.01 (nM DMS d-1)/(nM DMSP). In the second case study, hydrographic and biogeochemical field measurements from the 19961998 sampling seasons at the European Station for Time-series in the Ocean, Canary Islands (ESTOC) were used together with a physical model of ocean mixing to diagnose net biological fluxes of nutrients, oxygen, and carbon. On the annual basis ESTOC appeared to be close to metabolic balance, with interannual fluctuations between net autotrophy and net heterotrophy. Our results suggest that export production at the site is indistinguishable from zero. |
author2 |
Raymond G. Najjar Eugene E. Clothiaux Michael E. Mann David F. Hill |
format |
Text |
author |
Herrmann, Maria |
author_facet |
Herrmann, Maria |
author_sort |
Herrmann, Maria |
title |
DIAGNOSTIC MODELING OF OCEANIC BIOGEOCHEMICAL FLUXES USING A GENERAL OCEAN TURBULENCE MODEL (GOTM) AND TIME-SERIES TRACER MEASUREMENTS |
title_short |
DIAGNOSTIC MODELING OF OCEANIC BIOGEOCHEMICAL FLUXES USING A GENERAL OCEAN TURBULENCE MODEL (GOTM) AND TIME-SERIES TRACER MEASUREMENTS |
title_full |
DIAGNOSTIC MODELING OF OCEANIC BIOGEOCHEMICAL FLUXES USING A GENERAL OCEAN TURBULENCE MODEL (GOTM) AND TIME-SERIES TRACER MEASUREMENTS |
title_fullStr |
DIAGNOSTIC MODELING OF OCEANIC BIOGEOCHEMICAL FLUXES USING A GENERAL OCEAN TURBULENCE MODEL (GOTM) AND TIME-SERIES TRACER MEASUREMENTS |
title_full_unstemmed |
DIAGNOSTIC MODELING OF OCEANIC BIOGEOCHEMICAL FLUXES USING A GENERAL OCEAN TURBULENCE MODEL (GOTM) AND TIME-SERIES TRACER MEASUREMENTS |
title_sort |
diagnostic modeling of oceanic biogeochemical fluxes using a general ocean turbulence model (gotm) and time-series tracer measurements |
publisher |
Penn State |
publishDate |
2010 |
url |
http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-5843/index.html |
long_lat |
ENVELOPE(-64.050,-64.050,-64.770,-64.770) ENVELOPE(-64.050,-64.050,-64.770,-64.770) |
geographic |
Antarctic Antarctic Peninsula Palmer Station Palmer-Station Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Palmer Station Palmer-Station Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula North Atlantic Southern Ocean |
op_source |
http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-5843/index.html |
op_rights |
WorldWide Copyright information available at source archive |
_version_ |
1766082229593702400 |