白令海峡和那些曾经的跋涉者们

部落里最优秀的猎手,甚至仅凭着一杆鱼叉,或是一根梭镖,顶着冻原上凛冽的北风和北冰洋冰冷的海水,去和世界上最庞大的动物——鲸搏斗.对于从未见识过海洋威力的他们,究竟需要何等的勇气与信念.不知何时起,穿越小说蝗虫般地席卷了各大网站的读书频道,穿越剧也霸占了电视台的黄金档,颇有些“忽如一夜春风来”的味道.细想起来,每每在回溯...     

北极Barrow地区几种冻原植物的花粉形态

本文研究了北极巴罗 (Barrow)地区 1 2种冻原植物的花粉形态 ,它们的形状有球形、近球形、扁球形茧形和四合体型 ,其萌发孔有三孔沟、三沟、二合沟以及散孔等类型。花粉具辐射对称和两侧对称两种类型。这些花粉的植物体是北极冻原地区常见的植物 ,分属于 1 2个科 ,除 3种为小灌木外 ,大多数为多年生或一年生草本植物。这些冻原植物花粉形态的研究为恢复北极地区古植被和古气候的研究 ,提供了有价值的对比资料和依据。     

土壤增温对杉木幼林深层土壤CO2通量的影响（简报）

全球气候变暖已是不可争辩的事实,据IPCC(2007)预计到21世纪末,全球平均温度将增加1.1~6.4℃[1]。由此,在过去的20年中,全球相继开展了大量的增温控制实验,预测各类生态系统对全球变暖的响应。但是目前野外增温控制实验主要集中在温度受限制的中高纬度地区的草原、农田、冻原和森林生态系统[2-3],在30°N以南的热带和亚热带地区野外增温实验很少见[4-6]。由于低纬度地区的     

长白山高山冻原生态系统碳循环及与北极对比研究

探讨了长白山高山冻原生态系统的碳同化固定量、凋落物迁移量、冻原土壤生态系统的呼吸释放速率、有机碳库贮存量,并与北极进行了对比研究.结果证明:（1）长白山高山冻原植被生态系统目前年净储存有机碳2092t/a,总储存有机碳33457t;土壤库目前年均净储存有机碳1054t/a,总储存有机碳316203t,年均土壤呼吸速率为92.72/m2·a-1,是北极的 1.52倍;（2）白山高山冻原植被-土壤生态系统现已成为456081t的碳的储存库,其中,有机碳占76.7％,无机碳占23.3％.它是调节长白山小气候、维持长白山高山冻原植被类型、保护长白山冻原土壤、防治水土流失的巨大的屏障,同时对固定大气CO2起着巨大的汇作用.     

0 Short-term Climate Characteristics at Ny-Alesund over the Arctic Tundra Area

Based on the Germany Koldwey Station＇s 1994-2003 conventional observation hourly data, this paper conducts a statistical analysis on the short-term climate characteristics for an arctic tundra region （Ny-Alesund island） where our first arctic expedition station （Huanghe Station） was located. Affected by the North Atlantic warming current, this area has a humid temperate climate, and the air temperature at Ny-Alesund rose above 0 ℃ even during deep winter season during our research period. The wind speed in this area was low and appeared most at southeast direction. We find that the temperature at Ny-Alesund rose in the faster rate （0.68℃/10 a） than those at the whole Arctic area. Compared with the floating ices where our expedition conducted in the Arctic, Ny-Alesund was warmer and more humid and had lower wind speed. Comparison Of the near surface air temperature derived by NCEP/NCAR reanalysis to the conventional measurements conducted at the Koldwey site in Ny-Alesund area shows a good agreement for winter season and a slgnificant difference for summer season.