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151.
The South China Sea (SCS) is significantly influenced by El Niño and the Southern Oscillation (ENSO) through ENSO-driven atmospheric and oceanic changes. We analyzed measurements made from 1960 to 2004 to investigate the interannual variability of the latent and sensible heat fluxes over the SCS. Both the interannual variations of latent and sensible heat fluxes are closely related to ENSO events. The low-pass mean heat flux anomalies vary in a coherent manner with the low-pass mean Southern Oscillation Index (SOI). Time lags between the heat flux anomalies and the SST anomalies were also studied. We found that latent heat flux anomalies have a minimum value around January of the year following El Niño events. During and after the mature phase of El Niño, a change of atmospheric circulation alters the local SCS near-surface humidity and the monsoon winds. During the mature phase of El Niño, the wind speed decreases over the entire sea, and the air-sea specific humidity difference anomalies decreases in the northern SCS and increases in the southern SCS. Thus, a combined effect of wind speed anomalies and air-sea specific humidity difference anomalies results in the latent heat flux anomalies attaining minimum levels around January of the year following an El Niño year. 相似文献
152.
矿山边坡稳定性研究的回顾与展望 总被引:7,自引:4,他引:7
本文阐述了露天矿边坡工程的特点, 回顾了露天矿边坡稳定性研究及其取得的理论成果和进展, 指出露天矿边坡稳定性研究的特点, 提出相应的研究技术路线与方法。 相似文献
153.
Wang Xiutong Xu Hui Nan Youbo Sun Xin Duan Jizhou Huang Yanliang Hou Baorong 《中国海洋湖沼学报》2020,38(4):1018-1044
Corrosion protection has become an important issue as the amount of infrastructure construction in marine environment increased.Photocathodic protection is a promising method to reduce the corrosion of metals,and titanium dioxide(TiO_2) is the most widely used photoanode.This review summarizes the progress in TiO_2 photo gene rated protection in recent years.Different types of semiconductors,including sulfides,metals,metal oxide s,polymers,and other materials,are used to design and modify TiO_2.The strategy to dramatically improve the efficiency of photoactivity is proposed,and the mechanism is investigated in detail.Characterization methods are also introduced,including morphology testing,light absorption,photoelectrochemistry,and protected metal observation.This review aims to provide a comprehensive overview of Ti02 development and guide photocathodic protection. 相似文献
154.
Landscape ecological construction and biodiversity protection 总被引:1,自引:0,他引:1
Landscapeecology,producedbyaGermannamedC.Trollin1939,wenttoresurrectioninthe1980safterhavingwaveredforoverfortyyears,andnowithasbeenanimportant,complicatedandcomprehensivecrossdiscipline.Inthe21stcentury,thesocialsustainabledevelopmentwillbethemajo… 相似文献
155.
Journal of Oceanology and Limnology - Paralytic shellfish poisoning (PSP) microalgae, as one of the harmful algal blooms, causes great damage to the offshore fishery, marine culture, and marine... 相似文献
156.
膨胀岩(土)病害是一种特殊的工程地质现象。文章通过对广西军体校膨胀岩山体滑坡的整治经验进行总结,探讨其成因机理,提出对整治设计的一些看法 相似文献
157.
158.
Xu Tianzeng 《中国海洋湖沼学报》1984,2(2):168-176
A specific digital time correlative accumulation has been developed. It is an adaptable scheme of signal processing for underwater
acoustic technology used in telemetry., telecontrol and some remote sensing. Its basic principle is here introduced and the
prospects for successful use in an acoustic channel with multipath, time-space variables and high noise level are amply discussed.
The performances of this scheme are analysed.
The digital time auto-correlative accumulation has been used in two types of acoustic releases, and the cross-correlative
accumulation has been used in a shallow water targets telementer. There are some advantageous performances with these devices,
for example, the effective range of release can reach about 4 nautical miles in a much complex shallow water area such as
that in Xiamen Harbor where the depth ranges from 3 to 30 m, and the targets telemeter can normally keep working in even shallower
water area. 相似文献
159.
概略地叙述了西宁地区的泥石流形成条件和形成机理,并将西宁地区泥石流划分为稀性泥石流类及泥石质泥石流种类。在此基础上提出防治泥石流灾害的意见。 相似文献
160.
Accurate evaluation of soil productivity has been a long-standing challenge. Although numerous models for productivity assessment exist, most are cumbersome to use and require substantial parameter inputs. We developed a new empirical soil productivity model based on field investigations of soil erosion, soil physicochemical properties, and crop yields in the dry-hot valleys (DHVs) in China. We found that soil pH, and organic matter and available potassium contents significantly affected crop yields under eroded conditions of the DHVs. Moreover, available potassium content was the key factor affecting soil productivity. We then modified an existing soil productivity model by adding the following parameters: contents of effective water, potassium, organic matter, and clay, soil pH, and root weighting factor. The modified soil productivity model explained 63.5% of the crop yield. We concluded that the new model was simple, realistic, and exhibited strong predictability. In addition to providing an accurate assessment of soil productivity, our model could potentially be applied as a soil module in comprehensive crop models. 相似文献