Abstract
Gas exchange rates have been determined in the tidal Hudson River by injecting 2 inert gases, 3He and sulfur hexafluoride (SF6) and monitoring their decline with time. Their distributions along the main axis of the river were approximately gaussian and maximum concentrations of excess 3He and SF6 observed during each transect decreased from about 6500 × 10−16 cm3 STP g−1 and 250 ppt (part per trillion by volume), respectively, to values close to atmospheric equilibrium concentrations over a period of 16 days. Throughout the experiment, vertical gradients in tracer concentration were observed. After 3 days of mixing, tracer concentrations in bottom samples were 0–19% greater than in surface samples. Gas transfer velocities were calculated from the temporal change in the depth averaged excess 3He/SF6 ratio from stations having maximum tracer concentrations. They ranged from 1.5 to 9.0 cm h−1 and correlated well with mean wind speed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 274-285 |
| Number of pages | 12 |
| Journal | Tellus B |
| Volume | 46 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jan 1 1994 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Atmospheric Science
Cite this
Gas exchange rates in the tidal Hudson river using a dual tracer technique. / CLARK, JORDAN F.; WANNINKHOF, RIK; Schlosser, Peter; SIMPSON, H. JAMES.
In: Tellus B, Vol. 46, No. 4, 01.01.1994, p. 274-285.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Gas exchange rates in the tidal Hudson river using a dual tracer technique
AU - CLARK, JORDAN F.
AU - WANNINKHOF, RIK
AU - Schlosser, Peter
AU - SIMPSON, H. JAMES
PY - 1994/1/1
Y1 - 1994/1/1
N2 - Gas exchange rates have been determined in the tidal Hudson River by injecting 2 inert gases, 3He and sulfur hexafluoride (SF6) and monitoring their decline with time. Their distributions along the main axis of the river were approximately gaussian and maximum concentrations of excess 3He and SF6 observed during each transect decreased from about 6500 × 10−16 cm3 STP g−1 and 250 ppt (part per trillion by volume), respectively, to values close to atmospheric equilibrium concentrations over a period of 16 days. Throughout the experiment, vertical gradients in tracer concentration were observed. After 3 days of mixing, tracer concentrations in bottom samples were 0–19% greater than in surface samples. Gas transfer velocities were calculated from the temporal change in the depth averaged excess 3He/SF6 ratio from stations having maximum tracer concentrations. They ranged from 1.5 to 9.0 cm h−1 and correlated well with mean wind speed.
AB - Gas exchange rates have been determined in the tidal Hudson River by injecting 2 inert gases, 3He and sulfur hexafluoride (SF6) and monitoring their decline with time. Their distributions along the main axis of the river were approximately gaussian and maximum concentrations of excess 3He and SF6 observed during each transect decreased from about 6500 × 10−16 cm3 STP g−1 and 250 ppt (part per trillion by volume), respectively, to values close to atmospheric equilibrium concentrations over a period of 16 days. Throughout the experiment, vertical gradients in tracer concentration were observed. After 3 days of mixing, tracer concentrations in bottom samples were 0–19% greater than in surface samples. Gas transfer velocities were calculated from the temporal change in the depth averaged excess 3He/SF6 ratio from stations having maximum tracer concentrations. They ranged from 1.5 to 9.0 cm h−1 and correlated well with mean wind speed.
UR - http://www.scopus.com/inward/record.url?scp=84982718467&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84982718467&partnerID=8YFLogxK
U2 - 10.1034/j.1600-0889.1994.t01-2-00003.x
DO - 10.1034/j.1600-0889.1994.t01-2-00003.x
M3 - Article
AN - SCOPUS:84982718467
VL - 46
SP - 274
EP - 285
JO - Tellus, Series B: Chemical and Physical Meteorology
JF - Tellus, Series B: Chemical and Physical Meteorology
SN - 0280-6509
IS - 4
ER -