Tethys-Journal of Mediterranean Meteorology & Climatology最新文献

WeMO effects on the amount and the chemistry of winter precipitation in the north-eastern Iberian Peninsula WeMO对伊比利亚半岛东北部冬季降水数量和化学的影响

IF 1.5

Tethys-Journal of Mediterranean Meteorology & Climatology Pub Date : 2013-01-01 DOI: 10.3369/TETHYS.2013.10.05

Rebeca Izquierdo Miguel, M. Jordán, A. Á. I. Castells

{"title":"WeMO effects on the amount and the chemistry of winter precipitation in the north-eastern Iberian Peninsula","authors":"Rebeca Izquierdo Miguel, M. Jordán, A. Á. I. Castells","doi":"10.3369/TETHYS.2013.10.05","DOIUrl":"https://doi.org/10.3369/TETHYS.2013.10.05","url":null,"abstract":"The cluster classification of provenances at a site in the NE Iberian Peninsula indicated that in the period of extended winter (December to March, DJFM) fast Atlantic air flows correspond to positive WeMO index (WeMOi), while negative WeMOi are associated to Mediterranean circulations. The amount of winter precipitation was inversely correlated with winter WeMOi. Wet deposition fluxes of marine-derived (Na + , Mg 2+ and Cl ) and anthropogenic-derived (NO3 and K + ) ions were significantly (and negatively) related to winter WeMOi. The negative phase of WeMO causes the entry of air masses from the Mediterranean into the Iberian Peninsula, that are enriched with marine ions. For NO3 this result suggests the advection over the Mediterranean of polluted air masses from southern Europe and the scavenging and deposition of this pollution by rain during WeMO negative phases. This will carry long-range pollutants to the NE Iberian Peninsula, but local pollutants may also contribute, as precipitation events from the Mediterranean (associated to negative WeMOi) may incorporate local anthropogenic emissions that build up during the winter anticyclonic episodes typical of the region.","PeriodicalId":41133,"journal":{"name":"Tethys-Journal of Mediterranean Meteorology & Climatology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73917259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Determination of wind speed and associated loads over the sports facility collapsed during the severe windstorm of 24 January 2009 in Sant Boi de Llobregat (Barcelona) 2009年1月24日在Sant Boi de Llobregat(巴塞罗那)的剧烈风暴中倒塌的体育设施的风速和相关荷载的测定

IF 1.5

Tethys-Journal of Mediterranean Meteorology & Climatology Pub Date : 2011-06-23 DOI: 10.3369/TETHYS.2011.8.07

Jordi Mazón Bueso, Daniel Crespo Artiaga, D. González

{"title":"Determination of wind speed and associated loads over the sports facility collapsed during the severe windstorm of 24 January 2009 in Sant Boi de Llobregat (Barcelona)","authors":"Jordi Mazón Bueso, Daniel Crespo Artiaga, D. González","doi":"10.3369/TETHYS.2011.8.07","DOIUrl":"https://doi.org/10.3369/TETHYS.2011.8.07","url":null,"abstract":"he severe windstorm of 24 January 2009, caused by an explosive cyclogenesis, affected coastaland precoastal areas of the northeast of the Iberian Peninsula, where damages were numerousand significant, both in urban areas and in forests. One of the most important effects was thecollapse of a sports facility in Sant Boi de Llobregat (10 km southwest of Barcelona), killingfour children. The objective of this study is to estimate the wind speed over the sports facilityand calculate the suction of the wind on the roof of the building, and the consequent collapse ofthe walls. To get a first approximation, a simulation of the episode around the time of maximumwind gust was inspected using the mesoscale model MM5. In the second part, the damage aroundthe collapsed facility was analyzed, with which we note the fact that a truck was dragged andknocked over by the wind. This analysis allows for the conclusion that, in conjunction with themaximum wind gust, there was a sudden and very local shift in the wind, which caused the gustto hit the building head on. Based on this observation, the wind speed on surface and at 7 m(roof of the building) was estimated, and the suction of the wind was calculated.","PeriodicalId":41133,"journal":{"name":"Tethys-Journal of Mediterranean Meteorology & Climatology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2011-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79925691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Involving human forecasters in numerical prediction systems 在数值预报系统中涉及人类预报员

IF 1.5

Tethys-Journal of Mediterranean Meteorology & Climatology Pub Date : 2006-01-01 DOI: 10.3369/TETHYS.2006.3.08

D. Stensrud, Illes Balears

{"title":"Involving human forecasters in numerical prediction systems","authors":"D. Stensrud, Illes Balears","doi":"10.3369/TETHYS.2006.3.08","DOIUrl":"https://doi.org/10.3369/TETHYS.2006.3.08","url":null,"abstract":"Human forecasters routinely improve upon the output from numerical weather prediction models and often have keen insight to model biases and shortcomings. This wealth of knowledge about model performance is largely untapped, however, as it is used only at the end point in the forecast process to interpret the model-predicted fields. Yet there is no reason why human forecasters cannot intervene at other earlier times in the numerical weather prediction process, especially when an ensemble forecasting system is in use. Human intervention in ensemble creation may be particularly helpful for rare events, such as severe weather events, that are not predicted well by numerical models. The USA/NOAA SPC/NSSL Spring Program 2003 tested an ensemble generation method in which human forecasters were involved in the ensemble creation process. The forecaster highlighted structures of interest and, using an adjoint model, a set of perturbations were obtained and used to generate a 32-member ensemble. The results show that this experimental ensemble improves upon the operational numerical forecasts of severe weather. The human-generated ensemble is able to provide improved guidance on high-impact weather events, but lacks global dispersion and produces unreliable forecasts for non-hazardous weather events. Further results from an ensemble constructed by combining the operational ensemble perturbations with the human-generated perturbations shows promising skill for the forecast of severe weather while avoiding the problem of limited global dispersion. The value of human beings in the creation of ensembles designed to target specific high- impact weather events is potentially large. Further investigation of the value of forecasters being part of the ensemble creation process is strongly recommended. There remains a lot to learn about how to create ensembles for short-range forecasts of severe weather, and we need to make better use of the skill and experience of human forecasters in this learning process.","PeriodicalId":41133,"journal":{"name":"Tethys-Journal of Mediterranean Meteorology & Climatology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90222096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wave height incidence on Mediterranean Short Sea Shipping routes 地中海近海航线的浪高发生率

IF 1.5

Tethys-Journal of Mediterranean Meteorology & Climatology Pub Date : 2006-01-01 DOI: 10.3369/tethys.2006.3.01

F. X. M. D. Osés, M. Sanabra

引用次数: 3