[
Date Prev][
Date Next][
Thread Prev][
Thread Next][
Date Index][
Thread Index]
19990414: pwater
- Subject: 19990414: pwater
- Date: Mon, 19 Apr 1999 09:48:26 -0600
Calculation of PWTR is done in $GEMPAKHOME/src/gemlib/pc/pcpwtr.f.
Looking at your data below- aside from the fact that there are no column
lables to tell me what the values are, I see at least 2 strange things.
1) The first level(815mb) you show is from a different time (and is
above the presumable surface level of 838mb.
2) You have 2 entries for 303 mb. You probably want to check how you
handle duplicate levels with dp=0 in your calculations.
When using GEMPAK SN programs to calculate PWAT or PWTR, be aware that
PWTR allows you to calculate precipitable water in any layer- not just
the entire sounding- so you would need to specify the entire atmosphere.
Steve Chiswell
Unidata User SUpport
On Wed, 14 Apr 1999, Unidata Support wrote:
>
> ------- Forwarded Message
>
> >To: address@hidden
> >From: jasbir singh naul <address@hidden>
> >Subject: Gempak help!
> >Organization: .
> >Keywords: 199904142022.OAA01008
>
> Hi!
>
> This is naul , and i am Atmospheric Sciences
> student at UIUC . I am working on a class project
> and i wanted to use gempak souding data to restrieve
> Precipitable water from remote sensing . I tried
> to use gempak soundings and the Precipitable water
> from it to verify the results from remote sensing
> equations and i am not sure as to how gempak
> computes Precipitable water , caus my own calculations
> show an error of appx 0.3 mm in all soundings that i
> generated using gempak . I would really appreciate if you
> can explain me as to how gempak computes this value .
> Our Calc of ppt water for the below sounding is - 3.80206
>
> The output file that i generated from gempak looks like this ..
> with ppt water = 3.5 mm .
>
> ABQ 95010300 815.65 1829.00 2.94 1.33 .29
> ABQ 95010100 838.00 1620.00 8.80 2.67 .00
> ABQ 95010100 1000.00 146.00 -9999.00 -9999.00 -9999.00
> ABQ 95010100 925.00 799.00 -9999.00 -9999.00 -9999.00
> ABQ 95010100 850.00 1497.00 -9999.00 -9999.00 -9999.00
> ABQ 95010100 835.00 1649.41 7.00 1.56 .06
> ABQ 95010100 816.42 1829.00 5.33 1.56 .36
> ABQ 95010100 785.81 2134.00 2.49 1.56 .85
> ABQ 95010100 756.45 2438.00 -.34 1.56 1.31
> ABQ 95010100 728.09 2743.00 -3.18 1.56 1.77
> ABQ 95010100 700.00 3057.00 -6.10 1.56 2.21
> ABQ 95010100 680.00 3283.68 -6.50 .59 2.43
> ABQ 95010100 648.11 3658.00 -7.50 .48 2.61
> ABQ 95010100 642.00 3731.85 -7.70 .46 2.64
> ABQ 95010100 598.86 4267.00 -10.16 .41 2.83
> ABQ 95010100 553.21 4877.00 -12.97 .35 3.01
> ABQ 95010100 548.00 4949.84 -13.30 .35 3.03
> ABQ 95010100 500.00 5640.00 -18.90 .24 3.17
> ABQ 95010100 489.71 5791.00 -20.13 .23 3.20
> ABQ 95010100 469.56 6096.00 -22.62 .20 3.24
> ABQ 95010100 400.00 7260.00 -32.10 .12 3.35
> ABQ 95010100 379.41 7620.00 -35.11 .11 3.38
> ABQ 95010100 303.37 9144.00 -47.86 .06 3.44
> ABQ 95010100 303.37 9144.00 -47.86 .06 3.44
> ABQ 95010100 260.00 10141.72 -55.90 .03 3.46
> ABQ 95010100 250.00 10390.00 -56.10 .03 3.46
> ABQ 95010100 239.29 10668.00 -56.45 .03 3.46
> ABQ 95010100 217.38 11278.00 -57.21 .02 3.47
> ABQ 95010100 215.00 11347.77 -57.30 .02 3.47
> ABQ 95010100 200.00 11810.00 -53.30 .04 3.48
> ABQ 95010100 196.00 11939.61 -52.50 .04 3.48
> ABQ 95010100 168.00 12932.61 -51.50 .05 3.49
> ABQ 95010100 150.00 13660.00 -54.10 .04 3.50
>
>
>
>
> Hard work is the only investment that never fails .
>
> _____________________________________________________________
>
>
> Naul Jasbir Singh . ( MS Atmospheric Sciences )
>
>
> Office - | Home - Room - 103 , Annex 1 .
> Room # 103 , Annex -1 | 104 NorthLincoln Ave , Apt #
> Office Ph: 217-265-8166. | 102 , Urbana , IL - 61801 .
> | Ph : 217-344-7263.
>
> _____________________________________________________________
>
>
>
> ------- End of Forwarded Message
>
>
