Abstract

To describe the spatial characteristics of rainfall at sparsely distributed measurement network over the high-latitude mountainous regions in eastern Siberia through ground-based observation, rainfall observations were performed using non-recording standard rain gauges. Such standard rain gauges have been used over the years to measure annual rainfall at six sites from the Suntar Khayata Range to Oymyakon and 12 sites along the Kolyma Highway from Magadan to Agayakan. Relational expressions of rainfall were obtained and observation data from these gauges clearly showed that the corrected rainfall in these areas depends on altitude, that the rainfall increased slightly with an increase in altitude, and that the increased ratio of rainfall due to altitude decreased with an increase in the distance from the nearby coast.

Highlights

  • The climate system is a complex, interactive system consisting of the atmosphere, land surface, snow and ice, oceans and other bodies of water, and living things [1]

  • The relationship between altitude and rainfall in the tropical and mid-latitude regions such as Himalaya is analyzed by TRMM Precipitation Radar, and the results indicate a strong relationship between altitude and rainfall [8]

  • The amount of the corrected rainfall by the standard rain gauge installed at the Kitami Institute of Technology (KIT) site, RKIT, was 310.0 mm

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Summary

Introduction

The climate system is a complex, interactive system consisting of the atmosphere, land surface, snow and ice, oceans and other bodies of water, and living things [1]. In recent years global precipitation data sets have been developed, but known problems of the stationbased global precipitation data sets include precipitation gauge measurement biases [2,3] and nonuniform station networks [1, 4,5,6,7]. This causes that precipitation data sets constructed by the interpolation of point estimates to a coarse-resolution grid generally misrepresent precipitation in topographically complex regions due to an underrepresentation of gauge locations at high elevations [7]. Siberia is one of the areas in the world where observatories are distributed most sparsely according to the Global Surface Summary of Day (GSOD) produced by the National Climatic Data Center (NCDC)

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