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321.
MONTA?EZ P. Isabel HU Xiumian HOU Mingcai WANG Chengshan CHEN Jitao DDE Sedimentology Palaeogeography Groups 《《地质学报》英文版》2019,93(Z1):52-54
正1 Introduction Sedimentary rocks archive important information for understanding how the earth system operates and how life and environments have evolved through earth history.Properly identifying characteristics of sedimentary rocks,along with the subsequent interpretation of depositional processes and sedimentary environments in a basin or locality,are fundamental to inter-basinal correlation of sedimentary successions as well as to understanding and deconvolving regional and global processes 相似文献
322.
植物挥发性有机物的初步研究 总被引:1,自引:0,他引:1
2000年1~6月期间,美国国家大气研究中心(NCAR)和中国科学院大气物理研究所的科学家发展了一套自动的气相色谱系统和分析方法,用于分析大气中的挥发性有机物.此系统性能稳定,重复性好,对美国大气研究中心附近的大气进行了采样分析.作者简单介绍了此自动系统以及采样分析结果. 相似文献
323.
E.K.KRISHNA KUMAR S.ABHILASH SANKAR SYAM P.VIJAYKUMAR K.R.SANTOSH A.V.SREENATH 《大气科学进展》2023,40(4):697-710
The inverse relationship between the warm phase of the El Ni?o Southern Oscillation(ENSO) and the Indian Summer Monsoon Rainfall(ISMR) is well established. Yet, some El Ni?o events that occur in the early months of the year(boreal spring) transform into a neutral phase before the start of summer, whereas others begin in the boreal summer and persist in a positive phase throughout the summer monsoon season. This study investigates the distinct influences of an exhausted spring El Ni?o(springtime)... 相似文献
324.
Langer WD Velusamy T Kuiper TB Peng R McCarthy MC Travers MJ Kovacs A Gottlieb CA Thaddeus P 《The Astrophysical journal》1997,480(1):L63-L66
The cumulene carbenes are important components of hydrocarbon chemistry in low-mass star-forming cores. Here we report the first astronomical detection of the long-chain cumulene carbene H2C6 in the interstellar cloud TMC-1, from observations of two of its rotational transitions: J(K,K') = 7(1,7) --> 6(1,6) at 18.8 GHz and 8(1,8) --> 7(1,7) at 21.5 GHz, using NASA's Deep Space Network 70 m antenna at Goldstone, California. In addition we also observed the shorter cumulene carbene H2C4 at the same position. The fractional abundance of H2C6 relative to H2 is about 4.7 x 10(-11) and that of H2C4 is about 4.1 x 10(-9). The abundance of H2C6 is in fairly good agreement with gas-phase chemical models for young molecular cloud cores, but the abundance of H2C4 is significantly larger than predicted. 相似文献
325.
The Kunming Lake, with an area of 324 sq. kin. during its flood water time, is the largest lake in Eastern Yunnan. More than twenty streams from the surrounding mountains empty into the lake which is drained by the TangLang River to the upper Yangtze. Around the Kunming Lake is an extensive 相似文献
326.
P.TEILHARD DE CHARDIN 《地质学报》1939,19(3)
Since publishing my note in 1936~2 on the upper and lower jaw(of one and the same individual) of Postschizotherium discovered inthe Pliocene of S.E.Shansi (Yush(?)),two additional fragments of lower 相似文献
327.
P.TEILHARD DE CHARDIN 《地质学报》1937,17(2)
In the course of the past ten years,a constant outpouring of newfacts has continuously improved our views on the Late Cenozoic historyof North China.Hence a constant re-adjustement,not only of the 相似文献
328.
P.TEILHARD DE CHARDIN 《地质学报》1926,(Z1)
During the summer of 1923, we were so lucky F. Licent and myself as to get, in three different places, the first records of the palaeolithic Man in China. 相似文献
329.
This paper offers a preliminary statement of the results of investigations carried out in the South Sangkanho basin, in the mountains some 80 miles to the NW of Peking. Important fossiliferous deposits found in this area throw light on the conditions ruling in N. China during the transition from Pliocene 相似文献
330.
CARBONIFEROUS STRATIGRAPHY OF NORTHWESTERN KANSU. 总被引:1,自引:1,他引:0
The geological reconnaissance in the northwestern part of Kansu was undertaken during the five months from the end of June to the beginning of December, 1923, The area covered is along the graben trough 相似文献