1. Russian proposals to Scientific program of Hydrometeorological observatory in framework of meteorological and radiation measurements (prepared by A. Makshtas)

2. Joint Russian – US activities in 2006 - 2007 Automatic weather stations (AARI) Creation of Hydrometeorological Observatory in Tiksi (Joint Roshydromet – NOAA project)

3. Radiosoundings on “ Polarka” had been organized in 1935 with Russian sounds РЗ-43 и РЗ-049, then aerological complexes «Malahit А-22» (1957 - 1975) and «Meteorit –2» with sounds РКЗ-5 (1975 - 1988), then «АВК-1» and sounds МРЗ-3 (1988 – present)

4. Climate of free atmosphere in Tiksi (air temperature in winter)

5. Climate of free atmosphere in Tiksi (air temperature in summer)

6. Climate of free atmosphere in Tiksi (specific humidity in summer)

7. Climate of free atmosphere in Tiksi (wind velocity in winter)

8. Climate of free atmosphere in Tiksi (wind velocity in summer)

9. Standard meteorological observations had been organized in 1934 and the same sensors in use up to now

10. Preliminary results on long-term variability of air surface temperature and wind velocity

11. Preliminary results on long-term variability of total cloudiness and specific humidity

12. Places for measurements of fast ice thickness, sea level, water temperature and salinity Place for fast ice, water temperature, and salinity measurements Place for sea level measurements

13. Multiyear variability of maximal of fast ice thickness near Polarka Seasonal variability of fast ice thickness near Polarka during last decade

14. Long-term variability of sea level near Polarka in January (a) and July (b) a b

15. Recent measurements in Tiksi Standard meteorological observations (from 1934) Radiosoundings (from 1935) Total ozone content (from 1993) Geophysical measurements of polar ionosphere properties (1956) Sea level measurements (from 1949) Temperature and salinity of sea surface layer (from 1932) Fast ice thickness measurements (from 1934)

16. Planning by Roshydromet in 2007 modernization of meteorological station in Tiksi

17. ParameterSensor Temperature (T) and relative humidity (RH) QMH102, range of Т: -40…60°С, range of RH: 0 - 100%, accuracy Т: <±0,3°С, accuracy RH: ±2% for RH 0 - 90% and ±3% for RH 90 - 100% Distance of visibility, intensity of precipitation PWD21, range of visibility distance: 10 – 20000m; accuracy: ±10% for distance of visibility 10 – 10000m; ±15% for 10 – 20km; threshold for precipitation: 0,05 mm per hour, accuracy: 30% Total precipitationTretiakov’s gauge Wind speedWAA252, range: 0,4 – 75m/s, threshold: <0,5м/с, accuracy: ±0.5 m/s Wind directionWAV252, range: 0 - 360°, resolution: ±2,8°, threshold <0,4м/с, accuracy: <3° Air pressurePMT16A-M3, range: 600…1100 hPa, accuracy: ±0,3 hPa Surface temperatureQMT103, range: -50 -+60°С, accuracy ±0,1°С. Height of snow (ultrasonic method)DSU7210, range: 0,30 - 4,88m, accuracy: ±0,2% of range Sea levelPAA36W/Н, range: ±5м, accuracy: ±0.01м Modernization of meteorological station “Polarka” by Roshydromet in 2006

18. ParameterSensor Direct solar radiation (S)СН1, spectral range: 200 – 4000 nm, range of measurements: 0 – 4000 W/m 2, error: 2% or ±3 W/m 2 (maximal among two values) Incoming scattered solar radiation (D)СМР11, spectral range: 200 – 4000 nm, range of measurements: 0 – 4000 W/m 2, error: ±10 W/m 2 Total solar radiation (Q)СNR1, spectral range 300 – 3000 nm, range of measurements: 0 – 4000 W/m 2, error ±20 W/m 2 Reflected solar radiation (Rk)CNR1, spectral range 300 – 3000 nm, range of measurements: 0 – 4000 W/m 2, error ±20 W/m 2 Incoming longwave radiation (Ea)CNR1, spectral range 5 - 42 µm, range of measurements: 0 – 4000 W/m 2, error ±20 W/m 2 Outgoing longwave radiation (Eg)CNR1, spectral range 5 - 42 µm, range of measurements: 0 – 4000 W/m 2, error ±20 W/m 2 Traker 2АР-GDDirection to Sun with accuracy 0.05 0 Sensors for radiation measurements, planning for installation in Hydrometeorological Observatory

19. Scheme of data transmission from Hydrometeorological observatory to participants of Project

20. Questions, related to organization of data collection and transfer For organization of data transmission and preparation the documents for permission of data transfer to foreign participants we need the next information: a. the list of data for each installation b. description of interfaces c. protocols of output data d.volume and frequency of data, transmitted by satellite channel per day.