Table 1. Sampling stations in the Scripps O2/N2 network (After Keeling et al., [1998]).

 

Station code

Location

Position

Elevation (m)

Time period

ALT

Alert, Northwest Territories

82°27’N

62°31’W

210

Apr. 1991 to May 1996

CBA

Cold Bay,

Alaska

55°12’N

162°43’W

25

Aug. 1995 to Jul. 1996

NWR

Niwot Ridge,

Colorado

40° 3’N

105°38’W

3749

Apr. 1991 to Jan. 1993

LJO

La Jolla,

California

32°52’N

117°15’W

20

May 1989 to Jun. 1996

KUM

Kumukahi,

Hawaii

19°31’N

154°49’W

40

Jun. 1993 to Jul. 1996

MLO

Mauna Loa,

Hawaii

19°32’N

155°35’W

3397

Aug. 1993 to Jul. 1996

SMO

Cape Matatula,

U.S. Samoa

14°15’S

170°34’W

42

Jun. 1993 to Jul. 1996

CGO

Cape Grim,

Tasmania

40°41’S

144°41’E

94

Jan. 1991 to Jul. 1996

SPO

South Pole

89°59’S

24°48’W

2810

Nov. 1991 to Feb. 1996