Transcript Maryland Climate

Role of the Maryland State
Climatologist
Kenneth E. Pickering
Maryland State Climatologist
Department of Meteorology
University of Maryland
College Park
Maryland Climate Change Workshop
August 6, 2003
Functions of the Office of the
State Climatologist
• Archive climatic data for the State of Maryland
• Fulfill requests for data from the public
• Maintain a web page for distribution of data and
climate information
• Conduct special climate analyses
Drought
Temperature and precipitation trends
Snowfall frequency distributions
Agricultural applications
Functions (continued)
• Participate in media interviews
• Presentations concerning Maryland Climate to
community groups
• Data analyses in support of air quality modeling
efforts
Data Sources
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36 current NWS Cooperative stations
18 former NWS Cooperative stations
3 NWS/FAA airport stations
30 “other” volunteer observer stations
Meso-net stations (to be added)
Aircraft profiles
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24
32
43
56
Unknown Affil.
25
51
66
Private Indiv.
200
Legal Cases
100
U of MD System
K-12
Schools/students
Media
51
Engineering
32 35
Agriculture
59
Construct/Manufac.
Fed. Agencies
50
County Gov't
75
State Agencies
Maryland State Climatologist Office
2000-2002 Data Requests
213
175
150
125
61
Examples of Material on Maryland
State Climatologist Office Web Page
http://www.atmos.umd.edu/~climate/sc.html
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30-year normals for NWS stations
Growing season data
Interannual variability
Decadal trends
Longer-term climate change
2001-2002 Drought
Maximum rainfall deficits:
Aug. 2001 – Aug. 2002
Conowingo Dam
20.96”
Vienna
18.28”
Baltimore City
17.97”
Salisbury
17.93”
Royal Oak
17.86”
Beltsville
17.79”
BWI Airport
17.59”
Drought Comparisons
8/01-8/02
7/98-7/99
5/64-5/65
8/65-8/66
1/30-1/31
17 to 21 inch deficits over much of
state except Garrett Co.
12 to 21 inch deficits west of bay; 10 to
11 inch on Eastern Shore
15 to 18 inch deficits over much of state
except Garrett Co.
15 to 19 inch deficits over much of state
except Garrett Co.
16 to 26 inch deficit
4.09 deg./100 yrs.
0.55 deg/100 yrs.
12.93 deg./100 yrs.
1977-1999 Temperature Trends
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Baltimore City
Chestertown
Glenn Dale
Laurel
Oakland
Royal Oak
Salisbury
Woodstock
+9.88 oF/100 yr
+8.95
+12.04
+8.71
+9.67
+11.65
+12.77
+12.93
Temperature Departures From Normal
(in Degrees Fahrenheit)
Station
Dec ’01
Dec ’02
Jan ’02
Jan ’03
Feb ’02
Feb ’03
Dep. From Dep. From Dep. From Dep. From Dep. From Dep. From
Normal
Normal
Normal
Normal
Normal
Normal
BWI
airport
+5.4
-2.4
+6.8
-4.0
+3.8
-5.3
Dulles
airport
+5.9
-2.6
+7.4
-3.3
+4.1
-4.5
Reagan
National
airport
+6.1
-2.3
+6.7
-3.8
+4.5
-4.4
Baltimore City
AUGUST
Baltimore City
FEBRUARY
Comparison of Annual Precipitation Normals
Year
BWI
airport
Cumberland
Conowingo
Dam
Emmitsburg
19611990
40.76
in.
35.83
in.
45.48
in.
43.07
in.
19712000
41.94
in.
37.21
in.
48.09
in.
+2.81
+3.71
+5.43
Mechanicsville
Snow
Hill
Rockville
44.71
in.
44.53
in.
41.11
in.
45.34
in.
47.52
in.
46.18
in.
43.08
in.
+5.01
+5.91
+3.57
+4.57
%
increase
in
normals
Annual Mean # of Days with Snowfall
Frederick County
12
mean # of days
10
10.9
9.3
Catoctin
6
Emmitsburg
Frederick
7.5
8
6.5
5.7
6
Unionville
4.1 4.2
4
2
1.3
2
1.2
1.1
0
> 1 in.
> 2 in.
> 5 in.
snow (inches)
0.3 0.40.10.2
> 10 in.
Base = 50oF
Study Area and Selected Locations of Fixed Position
UMD Aircraft Spirals in 2002
43 spirals in MD
*College Park, MD
Cambridge, MD
*Fort Meade, MD
Annapolis, MD
*Cumberland, MD
Churchville, MD
Easton, MD
56 spirals in VA
*Richmond, VACrewe, VA
Luray, VA
Quinton, VA
Winchester, VA
Tappahannock, VA
Ashland, VA
Wakefield, VA
Louisa, VA
39 spirals in PA, NY, ME
*Erie, PA,
*Ithaca, NY
*Saratoga Springs, NY
*Augusta, ME
*Bar Harbor, ME
Summary
• Please visit our web site to see the various
types of climate information that we offer
• Please contact our office if you have
specific data requests or have a need for
specialized climate analyses
[email protected]