 |
| Titel |
Towards a universal relationship between wind speed and gas exchange: Gas transfer velocities measured with 3He/SF6 during the Southern Ocean Gas Exchange Experiment |
| VerfasserIn |
David Ho, Rik Wanninkhof, Peter Schlosser, David S. Ullman, David Hebert |
| Konferenz |
EGU General Assembly 2011
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250050135
|
|
|
|
|
|
| Zusammenfassung |
| Two 3He/SF6 dual gas tracer injections were conducted during the Southern Ocean Gas
Exchange Experiment (SO GasEx) to determine gas transfer velocities. During the
experiment, wind speeds of up to 16.4 m s-1 were encountered. The gas transfer
velocitykwas calculated from the decrease in the observed 3He/SF6 ratio using three different
mathematical approaches. Discrete points of wind speed and corresponding k were obtained
from the change in 3He/SF6 ratio over 3 time intervals. The results were also evaluated using
an analytical model and a 1-D numerical model. The results from the three approaches agreed
to within the error of the estimates of about 13-15% for Patch 1, and 4% for Patch 2.
Moreover, 3He/SF6 dual tracer results from SO GasEx are similar to those from other areas in
both the coastal and open ocean, and in agreement with existing wind speed/gas
exchange parameterizations. This suggests that wind forcing is the major driver of gas
exchange for slightly soluble gases in the ocean and that other known impacts are either
intrinsically related to wind or have a small effect ( |
|
|
|
|
|
|