Additional NARCCAP Results

Melissa Bukovsky

No Model Is Perfect

Some Models Are Useful

Surface Overview

Winter Temperature Bias

Summer Temperature Bias

CGCM, CRCM-ncep, CRCM-cgcm Winter

CGCM, CRCM-ncep, CRCM-cgcm Summer

GFDL, RCM3-ncep, RCM3-gfdl Winter

GFDL, RCM3-ncep, RCM3-gfdl Summer

Monthly Precipitation• From Wang et al. 2009 (JRL)• Fig. 1. (a) Orography and (b) cold-

season rainfall (Nov-May, Udel) of the Intermountain Region. The major mountain ranges are outlined by red lines. (c)-(g) Monthly rainfall histograms of Udel, averaged from the five regions indicated in Fig. 1b, superimposed with the corresponding precipitation of the NARR (thick black line) and all RCMs (color lines).

Diurnal Cycle: Temperature

0 3 6 9 12 15 18 21 24

-6

-4

-2

0

2

4

6

8

1980-2000 DJF NCEP Driven TAS (Whole NARCCAP domain)

NARRCRCMECPCHRM3MM5IRCM3WRFP

UTC

degr

ees

C

0 3 6 9 12 15 18 21 2410

12

14

16

18

20

22

24

1980-2000 JJA NCEP Driven TAS (Whole NARCCAP domain)

NARRCRCMECPCHRM3MM5IRCM3WRFP

UTC

degr

ees

C

Diurnal Cycle: Precipitation

0 3 6 9 12 15 18 21 240

0.5

1

1.5

2

2.5

3

1980-2000 DJF NCEP Driven PR (US Only)

NARRCRCMECPCMM5IRCM3WRFP

UTC

(mm

/day

)

0 3 6 9 12 15 18 21 240

1

2

3

4

5

6

1980-2000 JJA NCEP Driven PR (US Only)

NARRCRCMECPCMM5IRCM3WRFP

UTC

(mm

/day

)

NARR CRCM

ECPC HRM3

Summer Precipitation NCEP Driven Runs

NARR

Summer PrecipitationNCEP Driven Runs

MM5I

RCM3 WRFP

1980-1999 JJA GCM Precipitation

CCSM

GFDL NARR

1980-2000 JJA Precipitation w/ GCM Driven Run: CRCM and

CGCM

NARR

CRCM-ncep CRCM-cgcm

1980-2000 JJA Precipitation w/ GCM Driven Run: RCM3 and

GFDL

NARR

RCM3-ncep RCM3-gfdl

JJA 1980-2000 Precipitation Maximum Amplitude and Time of

Maximum

NARR

CRCM HRM3 MM5I

JJA 1980-20003-hr Average Pr

NARR00 UTC

03 UTC

06 UTC

09 UTC

12 UTC

CRCM

6h Pr Frequency Distribution

1980-1999/2000 JJA

GCMs

CCSM GFDL

%

NARR

RCM frqdist

WRFP

ECPCCRCM

3h Pr Frequency Distribution1980-1999/2000 JJA

RCMs (mm/h)

RCM3

NARR

%

MM5IHRM3