by : siv k. lauvset
DESCRIPTION
WWW.BJERKNES.UIB.NO. NORTH ATLANTIC RELATIONSHIPS BETWEEN SURFACE fCO 2 AND HYDROGRAPHY, EVALUATED USING fCO 2 -SST RELATIONSHIPS. BY : Siv K. Lauvset - PowerPoint PPT PresentationTRANSCRIPT
NORTH ATLANTIC RELATIONSHIPS BETWEEN SURFACE fCO2 AND HYDROGRAPHY, EVALUATED USING fCO2-SST RELATIONSHIPS
BY: Siv K. LauvsetAre Olsen; Ingunn Skjelvan; Alberto Borges; Wei-Jun Cai; Yves Dandonneau; Melchor Gonzalez Davila; Truls Johannessen; Arne Körtzinger; Nathalie Lefevre; Xose A. Padin; Fiz F. Perez; Aida F. Rios; J. Magdalena Santana-Casiano; Ute Schuster; Tobias Steinhoff; Taro Takahashi; Doug Wallace; Rik Wanninkhof; Andy Watson
WWW.BJERKNES.UIB.NO
STUDY We use ~250,000 data points from Jan-
Mar 1995-2007 covering the North Atlantic basin
Evaluate fCO2-SST relationships in 26 regions
Aim to increase understanding of circulation effects
The regions shown here are used to illustrate both the results and the methods used
NEC
NBC
GS AC
NAC
LC
NwACEGC
SST (ºC)
fCO
2 (a
tm)
•Overall positive trend
•Not a direct effect of temperature change
•A result of mixing of two different water masses
SST (ºC)
fCO
2 (a
tm)
•No correlation
•Two important water masses are first seen here
•These characteristics can be traced eastward across the basin
•Two regions where frontal movements have great impact on fCO2 distribution
•Both are related to shifts in NAO
CONCLUSIONS It is possible to follow a characteristic
fCO2-SST signal in a specific water mass and/or current
Mixing between water masses and across frontal regions
Circulation changes can explain many of the observed changes in fCO2 in the North Atlantic