临翔区无公害蔬菜生产现状与对策

临翔区地处云南省西南部，是临沧市政治、经济、文化中心。区域内立体气候显著，雨量充沛，水资源丰富，水质较好，森林覆盖率高，有较好的无公害蔬菜生产环境条件。     

冰芯记录揭示Lambert冰川谷地是东南极洲重要的气候分界线

横穿Lambert冰川流域和沿该流域东侧中山站-DomeA断面考察现场观测结果显示，该流域东、西两侧降水量的空间分布明显不同，东侧符合从海岸内向陆不断减小的普遍规律，西侧最大降水量在距海岸300-500km区域，东侧平均积累速率较西侧高。冰芯研究提出，过去50年来温度和降水变化呈现相反趋势：东侧温度和降水都为升高；西侧降水明显降低，温度虽有降低迹象，但变化不明显。海岸带考察站温度记录以及南极地区水汽传输模拟研究也得出谷地两侧的温度和降水有很大差异。在100-200年时间尺度上，其差异虽有所减弱，但Lambert冰川流域仍然比较独特。因此，可以认为Lambert冰种谷地是东南极洲重要的气候分界线。     

Microfossil assemblage characteristics in Core B10 and implication for paleoenvironmental evolution in the southern Yellow Sea

Microfossil assemblage and pollen zone characteristics in Core B10 recorded the history of environmental changes in the southern Yellow Sea since Wiirm Subinterglaciation. Environmental variations reflected by these glacial and interglacial sediments coincide with general characteristics of paleoenvironmental and sedimentary changes in the Yellow Sea. In the section of 550-520 cm, microfossil foraminifera have low abundance and diversity, and pollens are composed mainly of those of herbaceous vegetation, indicating climate change during Wiirm Subinterglaciation. In the section of 520-140 cm, the changes from a few microfossils to no microfossils reflect the sedimentary environment variation from coastal to terrestrial facies. Paleoclimate reflected by pollen also underwent the changes from conifer-broadleaf mixed forest to grassland, indicating the climate changes from temperate and cool type to warm and dry one. In the section of 140-0 cm, the general microfossil characteristics are the gradual increase in abundance with most species being neritic species, the major pollen being ligneous pollen and the rapid increase in small Hystrichosphaera content, which indicates that the air temperature increased and the sea level gradually rose.     

梦回13万年前

美国气象学家在最新出版的《科学》杂志上撰文指出,全球气候变暖导致极地地区冰盖融化速度加快,如果这个趋势无法得到缓解的话,海平面上升的速度将会大大超过以前的预期。科学家预测用不了500年时间,地球海平面的高度甚至有可能升高6米。     

气候对森林存在与分布的影响

森林是一个典型的生态系统，它以林木为主体．环境条件对其生长发育起主导和决定作用。在诸多环境条件中，气候对森林的影响起决定和主导作用．森林的分布在很大程度上取决于气候条件。