Air, Ground temperatures and Snow depth measurements for East Siberian Transect. AUTHORS: Vladimir E. Romanovsky Associate Professor Geophysical Institute UAF tel.: (907)474-7459 903 Koyukuk Drive FAX : (907)474-7290 P.O.Box 757320 Fairbanks, AK 99775-7320 e-mail: ffver@uaf.edu DATA SET OVERVIEW Time period covered by the data 188209 - 199412 Geographical coordinates Station Alt. Lat. Long. 001 Amga 147 m 60 54' 131 59' 002 Bestyakhskaya Zveroferma 60 m 65 12' 124 12' 003 Borogontsy 160 m 62 34' 131 37' 004 Churapcha 179 m 62 02' 132 36' 005 Dobrolet 468 m 60 22' 127 30' 006 Dzhardzhan 50 m 68 44' 124 00' 007 Isit' 117 m 60 49' 125 19' 008 Kazach'e 20 m 70 45' 136 13' 009 Krest-Khal'dzhai 119 m 62 49' 134 26' 010 Namtsy 90 m 62 44' 129 40' 011 Okhotskiy Perevoz 140 m 61 52' 135 30' 012 Olekminsk 223 m 60 24' 120 25' 013 Pokrovsk 116 m 61 29' 129 09' 014 Sangar 92 m 63 58' 127 28' 015 Sanyyakhtat 139 m 60 42' 124 00' 016 Ust'-Maya 169 m 60 23' 134 27' 017 Verkhoyansk 136 m 67 33' 133 23' 018 Vilyuisk 110 m 63 46' 121 37' 019 Ytyk-Kel' 120 m 62 22' 133 33' 020 Zhigansk 33 m 66 46' 123 24' 021 Khatyryk-Khomo 85 m 63 48' 125 06' INSTRUMENT DESCRIPTION Daily measurements of snow cover depth are taken from 3 snow measuring rods that are placed in a meteorological enclosure. In individual cases, when the meteorological enclosure is unrepresentative of the surroundings in respect to snow cover formation, the snow measuring rods are placed near the station on a specially selected plot. Observations are made on each rod to 1 cm accuracy. When making readings on the rods, the observer should remain 2-3 meters away from the rod. The snow depth is equal to the line on the rod level with the snow surface. When a layer of ice or water formed after snow melt exists near one of the rods, the depth of this layer is read on the rod. If the reading on the rod is less than half of the first interval on the rod, zero depth is recorded; if the depth is greater than half of the first interval on the rod, it is equal to one. The daily mean is calculated by averaging the readings on the three rods, rounded to the nearest whole cm. If the average is less then .5 cm, the mean is considered zero, and if it is greater than or equal to .5 cm , it is considered 1 cm. If snow, ice, or melt water is absent at one of the rods, then the mean depth is calculated by dividing the sum of the readings by 3. Using mercury thermometers with high inertiality temperature measurements were done. DATA FORMAT Files are in Excel format and have extensions xls. The name of file is the name of the station. For example - Amga.xls Data is in tables. The full names of columns are given as the first record. For example: Station_ID_number Date Mean_Monthly_Air_Temperature The_Number_of_Days_with_Snow Mean_Snow_Depth_for_the_first_decade Mean_Snow_Depth_for_the_second_decade Mean_Snow_Depth_for_the_third_decade Ground_temperature_at_0.2m_depth Ground_temperature_at_0.4m_depth Ground_temperature_at_0.8m_depth Ground_temperature_at_1.6m_depth Ground_temperature_at_3.2m_depth Header of the table: Station_ID Date Tair mean SD-I SD-II SD-III SD mean D0_2 D0_4 D0_8 D1_6 D3_2 Data 12 188209 7.6 99.99 99.99 99.99 99.99 99.99 99.99 99.99 99.99 99.99 DATA REMARKS Temperatures are given in degrees of Celsius, snow depth in centimeters. Accuracy of measurements: 0.1 degrees of Celsius for temperature measurements 1 cm for snow depth measurements Missing Data =99.99 REFERENCES World Meteorological Organization Handbook No. 9 Weather Reporting Vol. A, 1984 Klimatologicheskii spravochnik SSSR, vypusk 24,po Yakutskoi ASSR, severnoi chasti Khabarovskogo kraya,Magadanskoi oblasti i severnoi chasti Kamchatskoi oblasti. Meteorologicheskie dannye za otdel'nye gody, chast' VII,Temperatura pochvy, tumany, grozy, meteli i grad.Gidrometeoizdat, Leningrad, 1963. Spravochnik po klimatu SSSR, vypusk 24, Yakutskaya ASSR, Meteorologicheskie dannye za otdel'nye gody, chast' VII, Temperatura pochvy. Yakutsk, 1975.