The Evolution Characteristics of Daily-Scale Silk Road Pattern and Its Relationship with Summer Temperature in the Yangtze River Valley
By employing multi-reanalysis daily datasets and station data, this study focuses on the evolution characteristics of the daily-scale Silk Road pattern (SRP) and its effect on summer temperatures in the Yangtze River Valley (YRV). The results manifest that the evolution characteristics of positive-...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-06-01
|
| Series: | Atmosphere |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4433/12/6/747 |
| _version_ | 1797530716409430016 |
|---|---|
| author | Chao Wang Ying Wen Lijuan Wang Xianbiao Kang Yunfeng Liu |
| author_facet | Chao Wang Ying Wen Lijuan Wang Xianbiao Kang Yunfeng Liu |
| author_sort | Chao Wang |
| collection | DOAJ |
| description | By employing multi-reanalysis daily datasets and station data, this study focuses on the evolution characteristics of the daily-scale Silk Road pattern (SRP) and its effect on summer temperatures in the Yangtze River Valley (YRV). The results manifest that the evolution characteristics of positive- and negative-phase SRP (referred to SRP+ and SRP−) exhibit marked distinctions. The anomaly centers of SRP+ over West Central Asia (WCA) and Mongolia emerge firstly, vanishing simultaneously one week after peak date; however, the Far East (FE) anomaly centers can persist for a longer period. The SRP− starts with the WCA and FE centers, with a rapid decline in the strength of the WCA center and preservation of other anomaly centers after its peak. In the vertical direction, daily-scale SRP mainly concentrates in the mid-to-upper troposphere. Baroclinicity accounts for its early development and barotropic instability process favors the maintenance. Moreover, the SRP+ (SRP−) is inextricably linked to heat wave (cool summer) processes in the YRV. Concretely, before the onset of SRP+ events, an anomalous anticyclone and significant negative vorticities over East Asia related to SRP+ favor the zonal advance between the South Asia high (SAH) and western Pacific subtropical high (WPSH), inducing local descents over YRV area. The sinking adiabatic warming and clear-sky radiation warming can be considered as the possible causes for the YRV heat waves. The adiabatic cooling with the local ascents leads to more total cloud cover (positive precipitation anomalies) and less solar radiation incident to surface of the YRV, inducing the cool summer process during SRP−. |
| first_indexed | 2024-03-10T10:33:54Z |
| format | Article |
| id | doaj.art-2a2d02bb47304e3daec8215809cf199a |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T10:33:54Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-2a2d02bb47304e3daec8215809cf199a2023-11-21T23:26:07ZengMDPI AGAtmosphere2073-44332021-06-0112674710.3390/atmos12060747The Evolution Characteristics of Daily-Scale Silk Road Pattern and Its Relationship with Summer Temperature in the Yangtze River ValleyChao Wang0Ying Wen1Lijuan Wang2Xianbiao Kang3Yunfeng Liu4College of Air Traffic Management, Civil Aviation Flight University of China, Guanghan 618307, ChinaCollege of Air Traffic Management, Civil Aviation Flight University of China, Guanghan 618307, ChinaKey Laboratory of Meteorological Disaster, Ministry Education, Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaCollege of Air Traffic Management, Civil Aviation Flight University of China, Guanghan 618307, ChinaCollege of Air Traffic Management, Civil Aviation Flight University of China, Guanghan 618307, ChinaBy employing multi-reanalysis daily datasets and station data, this study focuses on the evolution characteristics of the daily-scale Silk Road pattern (SRP) and its effect on summer temperatures in the Yangtze River Valley (YRV). The results manifest that the evolution characteristics of positive- and negative-phase SRP (referred to SRP+ and SRP−) exhibit marked distinctions. The anomaly centers of SRP+ over West Central Asia (WCA) and Mongolia emerge firstly, vanishing simultaneously one week after peak date; however, the Far East (FE) anomaly centers can persist for a longer period. The SRP− starts with the WCA and FE centers, with a rapid decline in the strength of the WCA center and preservation of other anomaly centers after its peak. In the vertical direction, daily-scale SRP mainly concentrates in the mid-to-upper troposphere. Baroclinicity accounts for its early development and barotropic instability process favors the maintenance. Moreover, the SRP+ (SRP−) is inextricably linked to heat wave (cool summer) processes in the YRV. Concretely, before the onset of SRP+ events, an anomalous anticyclone and significant negative vorticities over East Asia related to SRP+ favor the zonal advance between the South Asia high (SAH) and western Pacific subtropical high (WPSH), inducing local descents over YRV area. The sinking adiabatic warming and clear-sky radiation warming can be considered as the possible causes for the YRV heat waves. The adiabatic cooling with the local ascents leads to more total cloud cover (positive precipitation anomalies) and less solar radiation incident to surface of the YRV, inducing the cool summer process during SRP−.https://www.mdpi.com/2073-4433/12/6/747Silk Road patternevolution characteristicssummer temperatureYangtze River Valley |
| spellingShingle | Chao Wang Ying Wen Lijuan Wang Xianbiao Kang Yunfeng Liu The Evolution Characteristics of Daily-Scale Silk Road Pattern and Its Relationship with Summer Temperature in the Yangtze River Valley Atmosphere Silk Road pattern evolution characteristics summer temperature Yangtze River Valley |
| title | The Evolution Characteristics of Daily-Scale Silk Road Pattern and Its Relationship with Summer Temperature in the Yangtze River Valley |
| title_full | The Evolution Characteristics of Daily-Scale Silk Road Pattern and Its Relationship with Summer Temperature in the Yangtze River Valley |
| title_fullStr | The Evolution Characteristics of Daily-Scale Silk Road Pattern and Its Relationship with Summer Temperature in the Yangtze River Valley |
| title_full_unstemmed | The Evolution Characteristics of Daily-Scale Silk Road Pattern and Its Relationship with Summer Temperature in the Yangtze River Valley |
| title_short | The Evolution Characteristics of Daily-Scale Silk Road Pattern and Its Relationship with Summer Temperature in the Yangtze River Valley |
| title_sort | evolution characteristics of daily scale silk road pattern and its relationship with summer temperature in the yangtze river valley |
| topic | Silk Road pattern evolution characteristics summer temperature Yangtze River Valley |
| url | https://www.mdpi.com/2073-4433/12/6/747 |
| work_keys_str_mv | AT chaowang theevolutioncharacteristicsofdailyscalesilkroadpatternanditsrelationshipwithsummertemperatureintheyangtzerivervalley AT yingwen theevolutioncharacteristicsofdailyscalesilkroadpatternanditsrelationshipwithsummertemperatureintheyangtzerivervalley AT lijuanwang theevolutioncharacteristicsofdailyscalesilkroadpatternanditsrelationshipwithsummertemperatureintheyangtzerivervalley AT xianbiaokang theevolutioncharacteristicsofdailyscalesilkroadpatternanditsrelationshipwithsummertemperatureintheyangtzerivervalley AT yunfengliu theevolutioncharacteristicsofdailyscalesilkroadpatternanditsrelationshipwithsummertemperatureintheyangtzerivervalley AT chaowang evolutioncharacteristicsofdailyscalesilkroadpatternanditsrelationshipwithsummertemperatureintheyangtzerivervalley AT yingwen evolutioncharacteristicsofdailyscalesilkroadpatternanditsrelationshipwithsummertemperatureintheyangtzerivervalley AT lijuanwang evolutioncharacteristicsofdailyscalesilkroadpatternanditsrelationshipwithsummertemperatureintheyangtzerivervalley AT xianbiaokang evolutioncharacteristicsofdailyscalesilkroadpatternanditsrelationshipwithsummertemperatureintheyangtzerivervalley AT yunfengliu evolutioncharacteristicsofdailyscalesilkroadpatternanditsrelationshipwithsummertemperatureintheyangtzerivervalley |