Atmosphere-Ocean最新文献_第8页

Surface Impacts of Springtime Extratropical Cyclones over the Bohai Sea and Yellow Sea, East Asia 东亚渤海和黄海春季温带气旋的表面影响

IF 1.2 4区地球科学

Atmosphere-Ocean Pub Date : 2021-10-20 DOI: 10.1080/07055900.2021.1997897

Meng Gao, Qian Zheng, Naru Xie

{"title":"Surface Impacts of Springtime Extratropical Cyclones over the Bohai Sea and Yellow Sea, East Asia","authors":"Meng Gao, Qian Zheng, Naru Xie","doi":"10.1080/07055900.2021.1997897","DOIUrl":"https://doi.org/10.1080/07055900.2021.1997897","url":null,"abstract":"Abstract Extratropical cyclones (ETCs) are active in spring over East Asia, and their surface impacts are crucial to northeast China, the Korean Peninsula, and Japan. In this study, a total of 215 continental ETCs crossing the Bohai Sea and Yellow Sea have been identified and tracked by applying an objective algorithm to the 850 hPa relative vorticity fields from the European Centre for Medium-range Weather Forecasts interim reanalysis (ERA-Interim) in March to May from 1979 to 2018. These ETCs were then classified into three groups by considering their geographical positions of cyclogenesis and cyclone tracks. Cluster 1 refers to the commonly named Mongolian cyclones that firstly travel southeastward and then recurve eastward. These ETCs are usually associated with a southward cold wave from Siberia and Mongolia resulting in decreasing temperature and reduced moisture uptake. The ETCs in cluster 2 mainly originate over the North China Plain, the leeside of the Loess Plateau, and Taihang Mountain, while ETCs in cluster 3 originate around southwest and central China. Greater moisture uptake occurred in the warmer region of these cyclones. The surface impacts of ETCs in clusters 2 and 3 were similar although their tracks were different. The passage of ETCs in clusters 2 and 3 across the Bohai Sea and Yellow Sea was associated with a period of lower tropospheric warming followed by a period of cooling. Extreme ETCs in all the three clusters could induce strong winds, and the risk of a storm surge was higher along the west and south coasts of the Bohai Sea and the west coast of the Korean Peninsula.","PeriodicalId":55434,"journal":{"name":"Atmosphere-Ocean","volume":"59 1","pages":"259 - 268"},"PeriodicalIF":1.2,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41839125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Climate Model Projections for Canada: A Comparison of CMIP5 and CMIP6 加拿大气候模型预测：CMIP5和CMIP6的比较

IF 1.2 4区地球科学

Atmosphere-Ocean Pub Date : 2021-10-20 DOI: 10.1080/07055900.2021.2011103

S. Sobie, F. Zwiers, C. Curry

{"title":"Climate Model Projections for Canada: A Comparison of CMIP5 and CMIP6","authors":"S. Sobie, F. Zwiers, C. Curry","doi":"10.1080/07055900.2021.2011103","DOIUrl":"https://doi.org/10.1080/07055900.2021.2011103","url":null,"abstract":"ABSTRACT Recent studies have identified stronger warming in the latest generation of climate model simulations globally, and the same is true for projected changes in Canada. This study examines differences for Canada and six sub-regions between simulations from the latest Sixth Coupled Model Intercomparison Project (CMIP6) and its predecessor CMIP5. Ensembles from both experiments are assessed using a set of derived indices calculated from daily precipitation and temperature, with projections compared at fixed future time intervals and fixed levels of global temperature change. For changes calculated at fixed time intervals most temperature indices display higher projected changes in CMIP6 than CMIP5 for most sub-regions, while greater precipitation changes in CMIP6 occur mainly in extreme precipitation indices. When future projections are calculated at fixed levels of global average temperature increase, the size and spread of differences for future projected changes between CMIP6 and CMIP5 are substantially reduced for most indices. Temperature scaling behaviour, or the regional response to increasing global temperatures, is similar in both ensembles, with annual temperature anomalies for Canada and its sub-regions increasing at between 1.5 and 2.5 times the rate of increase globally, depending on the region. The CMIP6 ensemble projections exhibit modestly stronger scaling behaviour for temperature anomalies in northern Canada, as well as for certain indices of moderate and extreme events. Such temperature scaling differences persist even if anomalously warm CMIP6 global climate models are omitted. Comparing the mean and variance of future projections for Canada in CMIP5 and CMIP6 simulations from the same modelling centre suggests CMIP6 models are significantly warmer in Canada than CMIP5 models at the same level of forcing, with some evidence that internal temperature variability in CMIP6 is reduced compared with CMIP5.","PeriodicalId":55434,"journal":{"name":"Atmosphere-Ocean","volume":"59 1","pages":"269 - 284"},"PeriodicalIF":1.2,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44329011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Rethinking the Characteristic Parameters of Typhoon Activity Frequency in the Western North Pacific 对北太平洋西部台风活动频率特征参数的再思考

IF 1.2 4区地球科学

Atmosphere-Ocean Pub Date : 2021-10-20 DOI: 10.1080/07055900.2021.1990839

Shanshan Zhong, Hao Wang, Xinchang Zhang, Zhiwei Wu

{"title":"Rethinking the Characteristic Parameters of Typhoon Activity Frequency in the Western North Pacific","authors":"Shanshan Zhong, Hao Wang, Xinchang Zhang, Zhiwei Wu","doi":"10.1080/07055900.2021.1990839","DOIUrl":"https://doi.org/10.1080/07055900.2021.1990839","url":null,"abstract":"ABSTRACT Typhoons are among the most dangerous weather systems on earth and can cause devastating disasters. Although great improvements have been made in the prediction of typhoon tracks during the past decades, typhoon frequency remains a major challenge in operational forecasting and climate prediction. Typhoon genesis frequency focuses on the frequency of formation of a single typhoon. However, the accumulation of single typhoons cannot effectively represent the anomalous characteristics of the corresponding circulation because of considerable differences among the typhoons, such as life history, track, and intensity. The occurrence of multiple typhoons or a single typhoon lasting for a long time over a particular region is usually closely related to the atmospheric circulation over that region. Therefore, in this study, the frequency of typhoons during a certain period and region is used to measure typhoon activity in the western North Pacific (WNP). It is found that the variation of typhoon existence frequency is different from that of typhoon genesis frequency. Typhoon existence frequency greatly improves the connection between typhoon activity and large-scale air–sea interactions (such as the El Niño–Southern Oscillation) and can better indicate the difference in weather and climate corresponding to typhoon activity anomalies. Further investigation reveals that typhoon existence frequency in the WNP during typhoon season is closely related to the North Pacific tripole pattern of sea surface temperature (SST) anomaly (NPSST) and the SST anomaly along the eastern coast of Australia in the South Pacific (SPSST) in the spring (April). A regression model using the NPSST and SPSST indices in April as predictors proved to have good skill in predicting the existence frequency of typhoons in the WNP during typhoon season.","PeriodicalId":55434,"journal":{"name":"Atmosphere-Ocean","volume":"59 1","pages":"246 - 258"},"PeriodicalIF":1.2,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41365829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Westerly Wind Bursts on ENSO Based on a Hybrid Coupled Model: Part I – ENSO Simulation 基于混合耦合模式的西风暴对ENSO的影响:第一部分- ENSO模拟

IF 1.2 4区地球科学

Atmosphere-Ocean Pub Date : 2021-09-28 DOI: 10.1080/07055900.2021.1973362

Md Tabrez Alam, Youmin Tang

{"title":"Impact of Westerly Wind Bursts on ENSO Based on a Hybrid Coupled Model: Part I – ENSO Simulation","authors":"Md Tabrez Alam, Youmin Tang","doi":"10.1080/07055900.2021.1973362","DOIUrl":"https://doi.org/10.1080/07055900.2021.1973362","url":null,"abstract":"ABSTRACT Westerly wind bursts (WWBs), usually occurring in the tropical Pacific region during the beginning and advancement of El Niño events, play a vital role in El Niño–Southern Oscillation (ENSO). In this study, we use a hybrid coupled model (HCM) for the tropical Pacific Ocean–atmosphere system to investigate the impact of WWBs on ENSO. To achieve this goal, we performed two experiments: first, the standard version of the HCM is integrated for years without prescribed WWBs events; and second, the WWBs are added to the HCM, which are constructed using observational data and WWB parameterization schemes. Results show that when WWBs are added to the HCM not only can a more realistic climatology of sea surface temperature (SST) in both spatial structure and temporal amplitudes be generated but also better ENSO features can be generated than with the HCM alone. The former is mainly reflected in the simulation of the SST seasonal cycle in the eastern Pacific and a reduction in the bias toward the cold tongue in the equatorial eastern Pacific, whereas the latter includes an improvement in a broad spectrum of ENSO features, such as ENSO amplitude, phase locking, asymmetry, and diversity. In particular, when WWBs are added to the HCM, the model can capture central Pacific ENSO events, which are absent in the original HCM. On the other hand, WWBs have little impact on cold events because very few WWBs occur during the cold phase of ENSO. Furthermore, the possible physical mechanisms responsible for these improvements as a result of adding WWBs are discussed.","PeriodicalId":55434,"journal":{"name":"Atmosphere-Ocean","volume":"59 1","pages":"233 - 245"},"PeriodicalIF":1.2,"publicationDate":"2021-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44396553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effects of Seasonal Ice Coverage on the Physical Oceanographic Conditions of the Kitikmeot Sea in the Canadian Arctic Archipelago 季节性覆冰对加拿大北极群岛基蒂克梅托海物理海洋学条件的影响

IF 1.2 4区地球科学

Atmosphere-Ocean Pub Date : 2021-08-31 DOI: 10.1080/07055900.2021.1965531

Chengzhu Xu, Wahad Mikhael, P. Myers, B. Else, R. Sims, Qi Zhou

{"title":"Effects of Seasonal Ice Coverage on the Physical Oceanographic Conditions of the Kitikmeot Sea in the Canadian Arctic Archipelago","authors":"Chengzhu Xu, Wahad Mikhael, P. Myers, B. Else, R. Sims, Qi Zhou","doi":"10.1080/07055900.2021.1965531","DOIUrl":"https://doi.org/10.1080/07055900.2021.1965531","url":null,"abstract":"ABSTRACT The Kitikmeot Sea is a semi-enclosed, east–west waterway in the southern Canadian Arctic Archipelago (CAA). In the present work, the ice conditions, stratification, and circulation of the Kitikmeot Sea are diagnosed using numerical simulations with a 1/12° resolution. The physical oceanographic conditions of the Kitikmeot Sea are different from channels in the northern CAA due to the existence of a substantial ice-free period each year. The consequences of such ice conditions are twofold. First, through fluctuations of external forcings, such as solar radiation and wind stress, acting directly or indirectly on the sea surface, the seasonal ice coverage leads to significant seasonal variations in both stratification and circulation. Our simulation results suggest that such variations include freshening and deepening of the surface layer, in which salinity can reach as low as 15 during the peak runoff season, and significantly stronger along-shore currents driven directly by the wind stress during the ice-free season. The second consequence is that the sea ice is not landfast but can move freely during the melting season. By analyzing the relative importance of thermodynamic (freezing and/or melting) and dynamic (ice movement) processes to the ice dynamics, our simulation results suggest that there is a net inflow of sea ice into the Kitikmeot Sea, which melts locally each summer. The movement of sea ice thus provides a significant freshwater pathway, which contributes approximately 14 km3 yr−1 of fresh water to the Kitikmeot Sea, on average, equivalent to a third of freshwater input from runoff from the land.","PeriodicalId":55434,"journal":{"name":"Atmosphere-Ocean","volume":"59 1","pages":"214 - 232"},"PeriodicalIF":1.2,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47341812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Reconstructing the Atlantic Overturning Circulation Using Linear Machine Learning Techniques 利用线性机器学习技术重建大西洋翻转环流

IF 1.2 4区地球科学

Atmosphere-Ocean Pub Date : 2021-08-12 DOI: 10.1080/07055900.2021.1947181

T. DelSole, Douglas Nedza

{"title":"Reconstructing the Atlantic Overturning Circulation Using Linear Machine Learning Techniques","authors":"T. DelSole, Douglas Nedza","doi":"10.1080/07055900.2021.1947181","DOIUrl":"https://doi.org/10.1080/07055900.2021.1947181","url":null,"abstract":"ABSTRACT This paper examines the potential of reconstructing the Atlantic Meridional Overturning Circulation (AMOC) using surface data and linear machine learning algorithms. The algorithms are trained on pre-industrial control simulations with the aim of finding an algorithm that can reconstruct the AMOC robustly across multiple climate models. Predictors include a combination of surface temperature and surface salinity, as well as a combination of simultaneous and lagged values relative to the AMOC. For most climate models, the correlation skill of the AMOC reconstructions is greater than 0.7. This reconstruction model involves thousands of predictors and is therefore difficult to interpret. To improve interpretability, machine learning algorithms were applied to Laplacian eigenvectors, which are an orthogonal set of spatial patterns that can be ordered from largest to smallest spatial scale. The skill of the new algorithms is comparable to that based on gridded data, but the new algorithms have the advantage that dimension reduction can be more meaningfully interpreted. The most important predictors were simultaneous and lagged time series of area-averaged surface temperature, and a pattern that measures the east–west salinity difference over the basin surface lagged in time. These three predictors could recover a substantial fraction of the total skill from machine learning algorithms for most climate models.","PeriodicalId":55434,"journal":{"name":"Atmosphere-Ocean","volume":"60 1","pages":"541 - 553"},"PeriodicalIF":1.2,"publicationDate":"2021-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46506288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modulation of the MJO-Related Teleconnection by the QBO in Subseasonal-to-Seasonal Prediction Models 亚季节到季节预报模式中QBO对mjo相关遥相关的调制

IF 1.2 4区地球科学

Atmosphere-Ocean Pub Date : 2021-05-27 DOI: 10.1080/07055900.2021.1944045

Pei-Ning Feng, Hai Lin

{"title":"Modulation of the MJO-Related Teleconnection by the QBO in Subseasonal-to-Seasonal Prediction Models","authors":"Pei-Ning Feng, Hai Lin","doi":"10.1080/07055900.2021.1944045","DOIUrl":"https://doi.org/10.1080/07055900.2021.1944045","url":null,"abstract":"ABSTRACT It was found in previous observational studies that the quasi-biennial oscillation (QBO) can modulate the teleconnection over the Atlantic basin related to the Madden–Julian Oscillation (MJO). In this study, we assess the modulation of the MJO-related teleconnection by the QBO in the operational models that participated in the subseasonal-to-seasonal prediction (S2S) project of the World Climate Research Programme/World Weather Research Programme. The enhancement of the positive North Atlantic Oscillation (NAO) after the occurrence of MJO phase 3, which corresponds to enhanced convection in the equatorial Indian Ocean and reduced convection in the tropical western Pacific, under westerly QBO (WQBO) conditions is seen to be captured by most S2S models but, not unexpectedly, to different degrees. In contrast, the enhancement of the NAO after the occurrence of MJO phase 7, when tropical convection anomalies have the opposite signs compared with MJO phase 3, under WQBO conditions is not reproduced in most S2S models. Under easterly QBO (EQBO) conditions, however, some S2S models can reproduce a significant negative NAO after the occurrence of MJO phase 7 but not a positive NAO after the occurrence of MJO phase 3. The results indicate that although the S2S models are able to predict a reasonable MJO up to around three weeks, representing the impact of the QBO on the extratropical teleconnection of the MJO remains challenging.","PeriodicalId":55434,"journal":{"name":"Atmosphere-Ocean","volume":"59 1","pages":"165 - 177"},"PeriodicalIF":1.2,"publicationDate":"2021-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/07055900.2021.1944045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48718106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Case Study of the Thermohaline Fine-scale Structure of the Sub-Arctic Front 亚北极锋温盐精细结构的实例研究

IF 1.2 4区地球科学

Atmosphere-Ocean Pub Date : 2021-05-27 DOI: 10.1080/07055900.2021.1955328

Kelan Zhu, Kefeng Mao, Xi Chen, Jiahao Wang, Hailang Wu

{"title":"A Case Study of the Thermohaline Fine-scale Structure of the Sub-Arctic Front","authors":"Kelan Zhu, Kefeng Mao, Xi Chen, Jiahao Wang, Hailang Wu","doi":"10.1080/07055900.2021.1955328","DOIUrl":"https://doi.org/10.1080/07055900.2021.1955328","url":null,"abstract":"ABSTRACT This paper analyzes the characteristics of the thermohaline fine-scale structure of the sub-Arctic front (SAF) in the Kuroshio–Oyashio confluence region using temperature, salinity, and current data obtained from surveys in June 2016. Thermohaline intrusion is found to be prevalent in the sea area of the SAF, occurring predominantly in frontal zones with depths less than 200 m and in North Pacific intermediate water (NPIW) layers with depths greater than 350 m. The intrusion in the SAF zones with depths less than 200 m has a higher intensity but smaller dimensions in the NPIW. According to our analysis, the thermohaline intrusion in the SAF sea zone is mainly attributable to the joint effect of double diffusion and flow instability. At depths of 0–350 m, the thermohaline intrusion is vulnerable to the influences of salt fingering, diffusive convection, and symmetric instability. At depths deeper than 350 m, diffusive convection is significant. In addition, shear instability might be a contributor. Considering that the effect of turbulent mixing is primarily governed by symmetric instability in the SAF sea areas, the flow instability characterized by a dominant contribution from symmetric instabilities might exert a more significant influence on thermohaline intrusion. The more distinct thermohaline staircases at layers deeper than 350 m, which are mainly produced by diffusive convection, have larger vertical scales than the staircases in other layers.","PeriodicalId":55434,"journal":{"name":"Atmosphere-Ocean","volume":"59 1","pages":"178 - 189"},"PeriodicalIF":1.2,"publicationDate":"2021-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48383472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Dynamic Characteristics of a Submesoscale Front and Associated Heat Fluxes Over the Northeastern South China Sea Shelf 南海东北架一次中尺度锋面及其相关热通量的动力学特征

IF 1.2 4区地球科学

Atmosphere-Ocean Pub Date : 2021-05-27 DOI: 10.1080/07055900.2021.1958741

Lei Zhang, Jihai Dong

{"title":"Dynamic Characteristics of a Submesoscale Front and Associated Heat Fluxes Over the Northeastern South China Sea Shelf","authors":"Lei Zhang, Jihai Dong","doi":"10.1080/07055900.2021.1958741","DOIUrl":"https://doi.org/10.1080/07055900.2021.1958741","url":null,"abstract":"ABSTRACT Submesoscale fronts, which are ubiquitous phenomena in the ocean, contribute considerably to oceanic material transports and energy cascades because of their ageostrophy. The dynamic characteristics of a thermal front over the northeastern continental shelf of the South China Sea (SCS) in winter are investigated using a two-layer nested high-resolution regional ocean model system. Results show that a strong thermal front is generated over the slope of the SCS area in winter with a cross-front temperature difference of 5°C and a spatial scale of 6 km. The calculated Rossby number reaches O(1) at the front and is accompanied by strong secondary circulation; the vertical velocity can reach 40 m d−1. The calculated barotropic and baroclinic energy conversion reveals that background kinetic and potential energies provide the energy generation of a submesoscale front. Meanwhile, the submesoscale front induces strong horizontal and vertical heat fluxes of up to 8×105 and 1.7×103 W m−2, respectively. The heat flux promotes not only the cross-shelf exchange of heat in the horizontal direction but also the re-stratification of seawater in the vertical direction.","PeriodicalId":55434,"journal":{"name":"Atmosphere-Ocean","volume":"59 1","pages":"190 - 200"},"PeriodicalIF":1.2,"publicationDate":"2021-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44043198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Impact of the Atlantic Multidecadal Oscillation on the Interannual Relationship Between the Storm Track and SST Over the North Atlantic in Spring 大西洋多年代际振荡对春季北大西洋风暴路径与海温年际关系的影响

IF 1.2 4区地球科学

Atmosphere-Ocean Pub Date : 2021-05-27 DOI: 10.1080/07055900.2021.1927665

Chenfei Liao, Jing Ma, Haiming Xu, Lan Wang, Hong Guo

{"title":"The Impact of the Atlantic Multidecadal Oscillation on the Interannual Relationship Between the Storm Track and SST Over the North Atlantic in Spring","authors":"Chenfei Liao, Jing Ma, Haiming Xu, Lan Wang, Hong Guo","doi":"10.1080/07055900.2021.1927665","DOIUrl":"https://doi.org/10.1080/07055900.2021.1927665","url":null,"abstract":"ABSTRACT The present study shows that the intensity of the springtime Atlantic storm track (AST) is affected by sea surface temperature (SST) anomalies in the tropical northern Atlantic (TNA) region on an interannual time scale, and the AST intensity variation in turn induces the underlying SST anomalies in the following months using the reanalysis data. Moreover, the interannual relationship is modulated by the Atlantic Multidecadal Oscillation (AMO) on a decadal time scale. During the negative phase of the AMO, AST activity weakens when warm SST anomalies appear in the TNA region, while warm TNA SST anomalies during the positive phase of the AMO correspond to a weakening of AST activity in the northeast region of the climatological AST. Anomalous westerly winds, Eady growth rate (EGR), and baroclinic energy conversion (BCEC) associated with the TNA SST anomalies can be found upstream of the AST anomalies during both AMO phases. On the other hand, the AST intensity variation is closely related to the underlying SST in the following months, especially in the next month. During the positive phase of the AMO, both the upward surface net heat flux (Q net) and westerly wind anomalies related to the AST are more marked than those during the negative phase of the AMO. This results in significant negative and westward-extending SST anomalies over the extratropical North Atlantic. This study suggests that the ocean–atmosphere interaction processes associated with the springtime AST variability are modulated by the AMO.","PeriodicalId":55434,"journal":{"name":"Atmosphere-Ocean","volume":"59 1","pages":"152 - 164"},"PeriodicalIF":1.2,"publicationDate":"2021-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/07055900.2021.1927665","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45471759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0