Climate Factors of Vapour Pressure and Diurnal Temperature Influenced on Radial Growth of Scots Pine in Northeastern Mongolia

Sumaira Yasmeen,Farah Perveen,Inam Ullah

doi:10.4236/oje.2019.99026

Abstract

To find out the optimum conditions of growth in Scots pine (Pinus sylvestris var. mongolica), we analyzed the radial growth response relationship to climate factors in boreal forests. We present growth response from 3-sites Mg (Mangui), KYH (kheyihe), NM (Nanmu) from central Daxing’an mountains. Drought observed in 1920s-1930s years. We analyzed growth response from 1920-2016. Results specified that growth of scots pine did not vary with variation in sites. We measure the influence of vapour pressure and mean maximum and mean minimum diurnal temperature have been shown by correlations of different growing seasons. Most of warm temperature during June to September and growth of Scots pine show a significantly positive increase during winter season. Overall inconsistency in climate conditions of Daxing’an mountains due to Atlantic and Pacific oceans, affects the Asian moon soon and alternatively changes the local temperature and precipitation and vapour pressure and increases the drought severity.

Highlights

We measure the influence of vapour pressure and mean maximum and mean minimum diurnal temperature have been shown by correlations of different growing seasons
Pinus sylvestris var. mongolica is the most extensive conifer as it can be spread throughout Eurasia as on the western Mediterranean to the Russian Far East
The Daxing’an Mountain is an important natural geographic barrier, in north east inner Mongolia and northwest Heilongjiang province, it is the middle part between semiarid inland area on northwest side and the Pacific Ocean

Summary

Introduction

There is most evidence that indicates Scots pine growth is influenced in cold constrained sited due to aggravated soil moisture deficit which linked to increasing demand for evapotranspiration or decreased in precipitation during growing season [5] [6]. Such contrasting influence of minimum temperature and drought brings uncertainty about productivity and vigor of species throughout the range and in cold-dry environment [7], besides other dry environments, warmer areas of Mediterranean, where scots pine subjected to winter and warm climate [8]

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