Wind velocity

air temperature

air relative humidity

photosynthetically active radiation were synchronously monitored using HOBO Portable-Meteorological Stations in the three nature communities including Tamarix ssp community

Tamarixssp—Alhagi sparsifoli—Karelinia caspicacommunity

Alhagi sparsifoliacommunity in the oasis—desert transitional zone of Qira County between July 23and August 24

2010.The difference of microclimate among the three plant communities was analyzed.The results show that the vegetation in the transitional zone has particular partial climate effect.With increase of vegetation coverage

wind speed and air temperature decreased

and relative humidity increased.The vegetation covers in communities of Tamarixssp

Tamarix ssp—Alhagi sparsifolia—Karelinia caspica

and Alhagi sparsifolia were 3%

27%

and 67%

respectively. During the observation period

the average wind speed at 0.5

1

2

4

8

and 10mhigh in Tamarix ssp—Alhagi sparsifolia—Karelinia caspica community and Alhagi sparsifolia community were 32%and 47%lower than that in Tamarixssp community;specifically

the average wind speed at 0.5mhigh was 57%and 47%lower

respectively.In communities of Tamarixssp—Alhagi sparsifolia—Karelinia caspica and Alhagi sparsifolia

the average air temperature(2mhigh)were 0.32℃and 1.02℃lower

and the average air relative humidity(2mhigh)were 2.33%and 7.67%higher than those of the Tamarixssp community

respectively.However

the photosynthestically active radiation had no significant difference between the three communities

although it was 40%and 60%lower on cloudy days and dust storms than that on clear days

respectively