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1引言
EN型测风数据处理仪（下称EN型风）在黑龙江使用多年来出现了一些故障,通过故障实例,分析形成原因,并找出处理方法。2风向打印77实例：本人在2002年的5月14日,6月17日,8月18日,2003年5月20日,对某EN型风进行鉴定处理时,多次发现风向打印77的故障。原因分析：风向打印77的故障,是EN型风出现次数最多的故障。 相似文献
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CINRAD/SA雷达天伺系统疑难故障原因剖析 总被引：2，自引：0，他引：2
2008年5月28日21:00至5月31日13:00济南CINRAD/SA雷达天伺系统出现一次综合性质的故障.故障涉及到天线伺服系统数字控制单元DCU(5A6)、光纤通信链路、数据采集单元DAU等几个环节.按常规思路检修故障不能修复.通过以数字控制单元状态显示和角码显示异常信息要点作为此次故障的突破口,重新查找故障原因并逐个击破修复,使雷达恢复正常运转.着重介绍此次疑难故障的原因分析和检修思路,旨在提高雷达技术保障能力. 相似文献
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简要介绍遵义CINRAD-CD汇流环故障现象,并分析故障出现的6种可能原因。根据故障原因,初步得出相应的6种排除方法和应对策略,以便维护人员遇到同类故障时,能有所借鉴。 相似文献
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自动站计算机一次故障的处理 总被引：2，自引：0，他引：2
描述一次自动站计算机出现死机故障的处理过程.分析自动站软件系统和硬件系统出现严重故障时的处理要点,提出测报系统维护需注意的几个问题. 相似文献
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本介绍了CAWS600地温传感器常出现的故障及其检查、排除方法，以便在CAWS600地温传感器出现故障时，能在最短的时间内找到故障原因，并及时排除或向省局故障台报告。 相似文献
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自动气象站出现不正常后的分析与处理 总被引：7，自引：0，他引：7
针对自动气象站出现的一次故障进行了分析,并介绍了故障排除的方法,以及故障排除后数据处理时应注意的问题。实践结果认为,不到万不得已不要轻易进行采集器复住,采集器复位要避开正点进行,且要特别注意做好原始数据的备份与释放工作。 相似文献
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通过区域自动站不上线故障的几个维修实例,对区域自动站不上线的故障进行一些分析.并对故障维修、处理和日常维护方法提出一些探讨性的预防措施,以便其他台站在遇到同样的问题时少走弯路. 相似文献
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王学林 《沙漠与绿洲气象(新疆气象)》2020,14(2):123-128
为提高环巢湖自行车公开赛的气象保障服务能力。本研究基于2013-2016年环巢湖自行车赛举办期间收集到的问卷调查资料，总结归纳出自行车骑行比赛的气象适宜性指标，并从强化措施和规避措施两个方面出发，构建基于脆弱性指标体系的环巢湖自行车公开赛风险辨识概念模型，并利用巢湖国家基本气象站1957-2016年逐日气象观测资料对2017年环巢湖自行车赛做个例分析。研究结果表明：（1）2017年4月23日我市降水适宜性和温度适宜性概率普遍较高，分别为70%和39%，而相对湿度和风速适宜度概率略偏低，因此，相对湿度和湿度是制约运动员发挥的重要因子。（2）各参评因子在4月份均具有明显的震荡特征，降水和相对湿度在四月上旬适宜度较高，而日平均气温和风速呈现明显相反的趋势。（3）降水适宜度综合指数在4月份普遍高于风速、温度、湿度，表明四月份无降水的概率普遍较高；综合适宜度指数四月中下旬优于上旬，表明环巢湖赛事选择下旬举行最佳。（4）分析综合因子重现期发现，四月下旬重现期普遍短于上中旬。本研究结果可为环巢湖自行车公开赛的赛前安排、赛事评估等方面提供科学依据。 相似文献
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淮北地区2010年4月异常低温气候特征及成因分析 总被引：1，自引：0，他引：1
利用1961—2010年NCEP/NCAR再分析资料和4月淮北地区气温资料,用累积距平(CA)法、合成分析法对淮北地区气温的时空分布特征以及2010年4月淮北地区持续冷气候背景进行分析。文章分析了淮北地区4月冷、暖年的大气环流异常及要素场的空间分布特征。结果表明:淮北地区4月气温的年代际变化特征明显,在1990年前后发生了突变。贝加尔湖南部,100°E以东的华北地区中低层的冷空气活动与淮北地区4月气温高低存在很好的相关性,该地中低层冷空气强(弱),淮北地区4月气温低(高)。冷暖年,乌拉尔山暖脊、东亚大槽、西伯利亚高压等差异显著,说明以上是影响淮北地区4月气温异常的关键系统。另据分析,El Nino与淮北地区4月气温异常也具有很好的相关性。 相似文献
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城市区域南北朝向室内表面温度特征 总被引：4，自引：3，他引：1
使用12月、4月、8月昆明城市区建筑物室内小气候的观测资料,分析了室内不同方位的墙体表面温度的特征、变化规律及差异。结果表明：南北朝向房屋不同内壁表面温度存在显著的时间和季节变化,4月和8月内壁表面温度较高,12月较低;12月室内表面温度变化受房屋朝向影响十分显著,4月和8月影响较小;南屋12月夜间S壁表面温度最大,昼间E壁最小;4月和8月则反之,夜间E壁表面温度最大,昼间S壁最小;北屋3个月份内夜间E壁表面温度均最大,昼间N壁最小。以上所得结果可为探讨房屋微气候特征和形成机制、原因,建筑物的合理设计和规划,以及改善人们居住环境的深入研究提供依据,并且为其它地区的相关研究提供参考。 相似文献
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YAN Bangliang 《大气科学进展》2005,22(5):741-750
The mechanism of the locking of the E1 Nino event onset phase to boreal spring （from April to June） in an intermediate coupled ocean-atmosphere model is investigated. The results show that the seasonal variation of the zonal wind anomaly over the equatorial Pacific associated with the seasonal variation of the ITCZ is the mechanism of the locking in the model. From January to March of the E1 Nino year, the western wind anomaly over the western equatorial Pacific can excite the downwelling Kelvin wave that propagates eastward to the eastern and middle Pacific by April to June. From April to December of the year before the E1 Nifio year, the eastern wind anomaly over the equatorial Pacific forces the downwelling Rossby waves that modulate the ENSO cycle. The modulation and the reflection at the western boundary modulate the time of the transition from the cool to the warm phase to September of the year before the E1 Nifio year and cause the strongest downwelling Kelvin wave from the reflected Rossby waves at the western boundary to arrive in the middle and eastern equatorial Pacific by April to June of the E1 Nino year. The superposition of these two kinds of downwelling Kelvin waves causes the El Nino event to tend to occur from April to June. 相似文献
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1. Introduction The observed facts show that the ENSO cycle has obvious phase-locking and oscillates irregularly (An and Wang, 2001; Kaplan et al., 1998). Based on Zibiak and Cane's (1987) model (hereafter, the Z-C model) and simple, coupled ocean-atmosph… 相似文献
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Internal and external wall surface temperatures (Tws) in April, August and December in Kunming, a city in low latitude plateau, were investigated. Results showed that the Tws in April were of the highest among the three, followed by August and December.… 相似文献
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Using OLR and 850 hPa and 200 hPa wind fields data (1979 – 2006), this paper diagnoses the
characteristics of convection over the tropical area in preceding autumns and winters in association with
April precipitation anomalies in Shandong province. It is found that preceding convection anomalies over
the Western Pacific Warm Pool in December have close relationships with the April precipitation in
Shandong. Further analysis of the relationship with the general circulation over the East Asia shows that
the convection anomaly over the Western Pacific Warm Pool has close relationships with the Main East
Asian Trough, the Hadley cell over East Asia and the Walker cell. The characteristics of East Asian
atmospheric circulation anomalies accompanied with stronger (weaker) convection are consistent with
those of less (more) April precipitation anomalies in Shandong. Therefore, the convection anomaly over the
tropics in December may be an important indicator for April precipitation in Shandong. 相似文献
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The statistical change-point analysis demonstrates that there is a climate regime shift in the April mean precipitation in Korea in 1981. The April mean precipitation in the years post-1981 showed a distinct decrease compared to the years pre-1981. This phenomenon was also noticed in China and Japan, excluding south China. One of the major causes for this decrease in April mean precipitation was the increased snow depth in the mid-latitude regions of continental East Asia. This resulted in a strengthened cold and dry anticyclone anomaly over continental East Asia and a relatively weakened subtropical anticyclone anomaly over the western North Pacific, thus forcing a continuation of the typical winter pressure pattern of “high-West and low-East” in East Asia in April. The strengthened northerly anomaly from this zonal pressure pattern anomaly played a significant role in restricting the northern movement of the subtropical anticyclone and preventing the inflow of warm and humid air into Korea.
相似文献19.
为增强烤烟对气候变化的适应性,提高烤烟经济效益与品质,以K346品种为材料,于2001年在弥勒县虹溪镇烟叶基地开展移栽试验,研究不同移栽期下的烤烟气象条件、农艺性状和经济效益以及烟叶化学成分进行统计分析,以期得出适宜的移栽期。结果表明：与4月20、30日和5月10日移栽相比,5月20日和5月30日移栽的温度及降水并不存在劣势,但光照与大田期≥10℃活动积温的劣势较明显;4月20日和5月10日移栽的气象条件有利于烟叶生长,而5月30日移栽的气象条件不利于烟叶生长,4月20日至5月10日移栽的气象条件与国内外优质烟区具有很高的相似性,5月20日和5月30日移栽期与国内外优质烟区气候相似程度小于4月20日至5月10日移栽期。适当提前移栽,可增加叶面积指数、株高、茎围和节距;随着移栽时间的推迟,烟叶产量、中上等烟比例和产值呈先上升后下降的规律;烟叶的产量、中上等烟比例、产值综合指标以移栽期为4月30日和5月10日较好。移栽期为4月30日和5月10日的烟叶化学指标总体表现适宜,化学成分协调。弥勒县虹溪镇或气象条件与之类似的烟区在4月30日到5月10日移栽,可以改善烤烟气象条件,易取得优质适产。 相似文献
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Xiaoyan Song Lijuan Li Guobin Fu Jiuyi Li Aijing Zhang Wenbin Liu Kai Zhang 《Theoretical and Applied Climatology》2014,116(3-4):371-384
A spring-composite index (s-CI) is proposed in this study that involves slightly altering the use of the accumulated precipitation from the composite index (CI) comparing the value with other three commonly used indices (standardized precipitation index, SPI; self-calibrated Palmer drought severity index, sc-PDSI; and CI). In addition, the spatial–temporal variation of the s-CI in the Songnen Plain (SNP) was investigated using the Mann–Kendall test and empirical orthogonal function (EOF) methods. The results indicated that the proposed s-CI could identify most drought events in 1990s and 2000s and performed relatively better than SPI, sc-PDSI, and CI in this region. Compared with the other three indices, the s-CI had a higher correlation with relative soil moisture in April and May. The recent spring droughts (2000s) were the most severe in April or May. The weather was drier in May compared with April in the 1980s, whereas the weather was wetter in May than in April in the 1960s and 1970s. Moreover, the spatial patterns of the first EOFs for both April and May indicated an obviously east–west gradient in the SNP, whereas the second EOFs displayed north–south drought patterns. The proposed index is particularly suitable for detecting, monitoring, and exploring spring droughts in the Songnen Plain under global warming. 相似文献