Deutsches Ozeanographisches
Datenzentrum
Inventur der Alkor-Reise AL516 (DOD-Ref-No.20180020)
Inventory of Alkor Cruise AL516 (DOD-Ref-No.20180020)
Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
---|---|---|---|---|
Alkor | AL516 | 12.09.2018 - 22.09.2018 | TRASE-EC |
Baltic Sea |
Fahrtleiter Chief Scientist | Institut Institute | Auslaufhafen Port of departure | Einlaufhafen Port of return | Stationskarte Station map | Schiffsroute Trackchart |
---|---|---|---|---|---|
Booge Dennis | Helmholtz Centre for Ocean Research Kiel (GEOMAR) | Kiel | Kiel |
Ziel der Reise / Objectives of Cruise:
Alkor AL516: Air-water gas exchange influences the cycling of biogeochemically important trace gases on global and regional scales (CO2, DMS, halocarbons, and non-methane hydrocarbons), and affects water quality on local scales (e.g., oxygen exchange). Wind speed is typically used to parameterize gas transfer and, in the last few decades, advancements in field and analysis techniques have enabled us to narrow the list of reasonable wind speed/gas exchange parameterizations that are applicable in most circumstance over the ocean. However, there are environments and conditions where existing parameterizations might not be applicable. One of these environments is inland seas where surfactants might have a more dominant effect on gas exchange. All the studies published to date that have investigated the effects of surfactants on air-sea exchange have either used artificial surface active compounds or have only measured surfactant and wave properties under natural conditions, rather than gas transfer or flux directly. This cruise aims to close that gap by conducting direct air-sea transfer measurements in the presence of a natural surfactant patch at the Baltic Sea time series station, Boknis Eck, where natural surfactant measurements have been recorded from 2009-2014 using surface-sensitive sum-frequency generation spectroscopy. We will use two different methods, simultaneously, to directly measure exchange: 1) 3He/SF6 tracer release experiments and 2) trace gas eddy covariance. In conjunction with gas exchange measurements, the abundance of surface active compounds will be quantified and characterized in order to determine the influence of surfactants/microlayer on the air-sea fluxes. Gas transfer parameterizations based on wind speed will be evaluated, both for the influence of surfactants and the difference between the open ocean and inland seas.
Messungen / Measurements
Institut Institute |
Wissenschaftler Scientist |
Anzahl Number |
Einheit Unit |
Typ der Messungen Type of measurements |
Kommentar Comments |
Daten im DOD Data in DOD |
---|---|---|---|---|---|---|
GEOMAH | Engel Anja | 9 | stations | B02 Phytoplankton pigments (e.g. chlorophyll, fluorescence) |
CTD, water samples, chla. | no |
GEOMAH | Engel Anja | 10 | day(s) | B02 Phytoplankton pigments (e.g. chlorophyll, fluorescence) |
Underway, water samples, chla. | no |
HAWAII | Ho David | 10 | day(s) | B06 Dissolved organic matter (e.g. DOC) |
continous CDOM and Chla fluorometer. | no |
GEOMAH | Booge Dennis | 10 | day(s) | B06 Dissolved organic matter (e.g. DOC) |
Underway, water samples, CDOM/FDOM. | no |
GEOMAH | Booge Dennis | 18 | stations | B06 Dissolved organic matter (e.g. DOC) |
CTD, water samples, CDOM/FDOM. | no |
GEOMAH | Engel Anja | 17 | stations | B72 Biochemical measurements (e.g. lipids, aminoacids) |
Zodiac, microlayer, surfactants, organic carbon and nitrogen, amino acids and sugars, carbohydrate and proteinous gel particles. | no |
CAUKI | Friedrichs Gernot | 17 | stations | B72 Biochemical measurements (e.g. lipids, aminoacids) |
Zodiac, microlayer, lipids, surfactants. | no |
CAUKI | Friedrichs Gernot | 18 | stations | B72 Biochemical measurements (e.g. lipids, aminoacids) |
CTD, water samples, lipids, surfactants. | no |
GEOMAH | Fischer Tim | 10 | day(s) | D71 Current profiler (e.g. ADCP) |
continous current measurements. | no |
HAWAII | Ho David | 17 | stations | D90 Other physical oceanographic measurements |
surface tension measurements. | no |
GEOMAH | Fischer Tim | 17 | stations | D90 Other physical oceanographic measurements |
Zodiac, microstructure sonde. | no |
GEOMAH | Fischer Tim | 36 | stations | D90 Other physical oceanographic measurements |
CTD, water samples, salinity. | no |
GEOMAH | Fischer Tim | 56 | stations | H00 Stations |
- | yes |
GEOMAH | Fischer Tim | 36 | stations | H10 CTD-Stations |
CTD, sensor data, salinity, temperature, oxygen, fluorescence. | no |
GEOMAH | Booge Dennis | 6 | stations | H21 Oxygen |
CTD, water samples, oxygen. | no |
GEOMAH | Booge Dennis | 10 | day(s) | H23 Total - P |
Underway, water samples, nutrients. | no |
GEOMAH | Booge Dennis | 18 | stations | H23 Total - P |
CTD, water samples, nutrients. | no |
GEOMAH | Quack Birgit | 6 | stations | H33 Other dissolved gases |
CTD, water samples, DMS, isoprene, CS2. | no |
GEOMAH | Booge Dennis | 10 | day(s) | H33 Other dissolved gases |
Underway, samples, DMS, isoprene, CS2. | no |
GEOMAH | Booge Dennis | 18 | stations | H33 Other dissolved gases |
CTD, water samples, DMS, isoprene, CS2. | no |
GEOMAH | Bange Hermann W. | 10 | day(s) | H33 Other dissolved gases |
continous, N2O, CO. | no |
GEOMAH | Bange Hermann W. | 11 | stations | H33 Other dissolved gases |
CTD, water samples, N2O/CH4. | no |
HAWAII | Ho David | 10 | day(s) | H73 Geochemical tracers (e.g. freons) |
continous SF6 measurements. | no |
HAWAII | Ho David | 18 | stations | H73 Geochemical tracers (e.g. freons) |
CTD, water samples, 3He and SF6. | no |
GEOMAH | Booge Dennis | 10 | day(s) | H74 Carbon dioxide |
continous pCO2 measurements. | no |
GEOMAH | Booge Dennis | 10 | day(s) | M71 Atmospheric chemistry |
Continous eddy covarince fluxes of DMS and CO2. | no |