SURFACE OZONE CHARACTERISTICS AT THREE STATIONS IN GAW OF WMO IN CHINA^*     

DING Guoan  XU Xiaobin  LUO Chao  TANG Jie  XIANG Rongbiao  YAN Peng  LI Xingsheng 《Acta Meteorologica Sinica》2001,15(1):21-28

The characteristics of surface O₃ on clear days at Waliguan Observatory,Lin'an regional station and Longfengshan regional station in China were analyzed in this paper.The three stations belong to Global Atmospheric Watch(GAW)of WMO.There was obvious daily variation on clear days at Lin'an.with maximum(42.9 ppb)and minimum(20.3 ppb)of daily range appearing in spring and summer,respectively.The daily variation was more regular at Lonfengshan than at Lin'an.The maximum(about 27 ppb)appeared in autumn at Longfengshan.There was no obvious daily variation and also daily range was smaller in other seasons except weaker daily variation in summer at Waliguan.But the surface O₃ concentration(SOC)in summer was higher than that in winter at Waliguan.The SOC on clear days of summer at Waliguan was over 20 ppb higher than at Longfengshan and Lin'an.The global radiation and NO_x concentration were the main factors which control the SOC on clear days at Longfengshan and Lin'an.and played important role in different seasons and areas.The transportation of air flow around the area of Qinghai-Xizang(Tibet)Plateau was the main cause for high SOC and weak daily variation in summer at Waliguan.The similar effect of transportation was obtained at the Mauna Loa Observatory.The distribution characteristics of SOC increasing with height in the troposphere determined the difference of SOC between East China and West China.  相似文献   

WRF-RUC在2014年江西汛期降水预报中的检验分析   总被引：1，自引：0，他引：1  

徐星生  万明  薛谌彬  王海 《气象与减灾研究》2014,(3):23-28

利用江西省92个国家气象观测站雨量资料,对2014年汛期江西WRF-RUC系统的降水预报进行逐6 h、12 h和24 h晴雨检验、降水分级检验以及同期区域暴雨个例检验分析。结果表明:1)6 h、12 h、24 h晴雨检验PC评分分别达0.6、0.7、0.8,系统表现了稳定的预报性能。2)系统对小雨、中雨和大雨具有较好的预报能力,对局地暴雨、大暴雨的预报能力较弱,而对区域暴雨的预报具参考意义。3)系统有效地缩短了spin-up时间,系统在积分6 h后达到最佳预报性能,并在起报后6—12 h时段,预报效果最佳。4)系统对降水范围以及小雨、中雨、大雨过度预报,对暴雨、大暴雨范围预报比较合理。  相似文献   

Moving Surface Spline Interpolation Based on Green’s Function     

Xingsheng Deng  Zhong-an Tang 《Mathematical Geosciences》2011,43(6):663-680

Some commonly used interpolation algorithms are analyzed briefly in this paper. Among all of the methods, biharmonic spline interpolation, which is based on Green’s function and proposed by Sandwell, has become the mainstream method for its high precision, simplicity and flexibility. However, the minimum curvature method has two flaws. First, it suffers from undesirable oscillations between data points, which is solved by interpolation with splines in tension. Second, the computation time is approximately proportional to the cube of the number of data constraints, making the method slow for situations with dense data coverage. Focusing on the second problem, this paper introduces the moving surface spline interpolation method based on Green’s function, and the interpolation error equations are deduced. Because the proposed method only chooses the nearest data points by using the merge sort algorithm for interpolating, the computation time is greatly decreased. The optimal number of the nearest points can be determined by using the interpolation error estimation equation. No matter how many data points there are, this method can be implemented without difficulty. Examples show that the proposed method can obtain high interpolation precision and high computation speed at the same time.  相似文献   

浙江羚羊头骨化石的发现与研究     

金幸生  吴维棠  杜天明 《浙江国土资源》1994,(2)

本文论述了1992年采自浙江开化的一件羚羊头骨化石。标本经记述对比研究后，认为它代表了GazelleBlaimville的一个新种，命名为开化羚羊（新种）Gazellekaihuaensissp．nov，时代也属于晚更新世。尚系浙江首次发现，这对羚羊的分布范围及其古地理、古环境等方面的研究具有一定的意义。  相似文献   

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邓兴升  陈石桥  丁美青 《大地测量与地球动力学》2013,33(2):45-48

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邓兴升  汤仲安  花向红  舒玉芝 《大地测量与地球动力学》2010,30(2):49-52

?о?????任???????????????????????????SuperCoor????????????????????????任??????????????????????????????ε??????3??????任?????????￡??????????????????  相似文献   

高频单历元GPS双差解算及其精度分析     

邓兴升  孙虹虹  唐安雷 《大地测量与地球动力学》2015,35(2):190-193

基于Windows研制WinTrack高频单历元GPS双差解算软件,进行10 Hz短基线和1 Hz中基线高频观测、动态差分解算及精度分析。试验表明,中短基线条件下,高频单历元GPS双差解的保守精度为cm级,与数据质量、观测条件及时机等因素相关;不同精密星历条件下的解算精度一致,而5 m精度广播星历对短基线结果最大差异小于1 mm。  相似文献   

加权整体最小二乘EIO模型与算法     

邓兴升  彭思淳  游扬声 《测绘学报》2019,48(7):926-930

构造了加权整体最小二乘EIO(errors-in-observations)模型,只改正独立观测值,观测值协因数阵最简洁,可克服EIV模型缺陷。基于EIO模型推导了参数估计和协因数阵精确迭代算法,实例结果正确,计算效率高。  相似文献   

浙江中生代浅成热液金银成矿系统的自组织与耗散结构     

胡永和  朱兴盛  麻土华 《浙江国土资源》2000,(2)

浙江中生代浅成热液金银矿床多具明显的热液蚀变 (矿化 )分带—自组织结构。通过对围岩蚀变—矿化过程中的W /R(水 /岩 )比值、元素的带出 (λ)量[EO(I)A] ,熵变 (ΔS)、成矿成岩时差(Δti)和S°298/di(标准熵 /离子密度 )比值、盐度 (St)、P(压力 )、fs2(硫逸度 )和fo2(氧逸度 )、δ18OH2O 和δD、206Pb/204Pb和207Pb/204Pb值等变化的研究 ,表明浅成热液金银成矿系统是一个非平衡 (距热力学平衡态有一定距离 )的开放系统 ,矿床都是在开放环境下成矿流体通过能量的不断耗散并与围岩发生物质交换的一种自组织过程中形成的 ,具耗散结构的特征。一般W/R、EO(I)A和Δti与S°298/di∝MSOD(成矿系统开放程度 )。也就是说 ,围岩蚀变 -矿化过程中W /R比值、元素的带出(入 )量和Δti与S°298/di比值及ΔS值较大 ,一般成矿系统的开放程度也较高 ,成矿一般也较有利  相似文献   

中国综合农业分区下的(A)ngstr(o)m-Prescott公式系数逐月校正与优选     

夏兴生  潘耀忠  朱秀芳  张锦水 《地理学报》2021,76(4):888-902

(A)ngstr(o)m-Prescott公式是联合国粮食及农业组织(FAO)推荐的计算地表有效总太阳辐射(Rs)数据以支持参考作物需水量估算等研究的简便方法.本文以优选中国综合农业分区的(A)ngstr(o)m-Prescott公式系数as、bs为目标,采用最小二乘回归方法,以全国范围内121个地面气象站点1957-...  相似文献