Table 1. (a) Variables included in the groups of 2° (3-7) and 1° (3-7 plus 9) monthly summary statistics (available from NCAR). Derived variables closely related to heat and momentum fluxes are shown in boldface: wind pseudo-stresses (X, Y), and sensible-heat (E, I, J) and latent-heat (G, K, L, M, N) flux or transport parameters (QS is the saturation specific humidity at sea surface temperature). Note that transfer coefficients, etc. have not been applied to the pseudo-fluxes, e.g., UQ is simply the product of individual observations of U and Q. (b) The 8 (10) statistics included in the 2° (1°) groups. For 2° data, the full set of 19 variables × 14 statistics is also available (from NCAR) in an alternative (higher volume) format; the 14 statistics comprise all except "e" below, plus the additional sextiles (s0, s2, s4, s6). ERL's Climate Diagnostics Center also offers selected statistics in netCDF format, and both NCAR and NCDC distribute individual observations (see the COADS Web page at http://www.cdc.noaa.gov/coads/ for additional information).
| 3 | 4 | 5 | 6 | 7 | 9 (1°) |
| Sea surface temperature (S) | Scalar wind (W) | Total cloud. (C) | D=S - A | I=UA | M=FU |
| Air temperature (A) | Wind U-component(U) | R | E=(S - A)W | J=VA | N=FV |
| Specific humidity (Q) | Wind V-component(V) | X=WU | F=QS - Q | K=UQ | B1** |
| Relative humidity (R) | Sea level pressure (P) | Y=WV | G=(QS - Q)W | L=VQ | B2** |
| Statistics available from 2° and 1° groups | Additional statistics available from 1° groups | ||
| d | mean day-of-month of observations | ||
| h | fraction of observations in daylight | ||
| x | mean longitude of observations | ||
| y | mean latitude of observations | ||
| n | number of observations | s1 | 1/6 sextile (a robust estimate of m - 1s) |
| m | mean | s5 | 5/6 sextile (a robust estimate of m + 1s) |
| e | standard deviation estimate*** | s | standard deviation |
| s3 | 3/6 sextile (the median) | ||
* Groups 1-2 were for earlier Release 1 untrimmed data, and group
8 (containing, redundantly, S, A, X, Y) is available only for
1980-95 data.
** This is W3 (the identical quantity, using the same
input data) represented at high- or low-resolution (i.e., data
increments of 0.5 or 5 m3 s-3). Due to
format constraints, values of W3 exceeding 32,767 m3
s-3 are available only in the low-resolution representation.
*** Not directly included in the 1° statistics, but defined
as (s5 - s1)/2 and thus computable from the 1° statistics.