Sheng Chen, Siyuan Wu, Wenzheng Jiang, Fangli Qiao, Zhanli Wang
{"title":"沿海地区海气感热通量的中尺度变率观测","authors":"Sheng Chen, Siyuan Wu, Wenzheng Jiang, Fangli Qiao, Zhanli Wang","doi":"10.1029/2025GL115797","DOIUrl":null,"url":null,"abstract":"<p>The meso-gamma scale variability of air-sea sensible heat flux <span></span><math>\n <semantics>\n <mrow>\n <mtext>HS</mtext>\n </mrow>\n <annotation> $\\text{HS}$</annotation>\n </semantics></math> was investigated using synchronized flux observations from two tower-based platforms within 10 km over coastal regions. Observations revealed statistically weak correlations between spatial <span></span><math>\n <semantics>\n <mrow>\n <mtext>HS</mtext>\n </mrow>\n <annotation> $\\text{HS}$</annotation>\n </semantics></math> variability and both 10 m wind speed <span></span><math>\n <semantics>\n <mrow>\n <msub>\n <mi>U</mi>\n <mn>10</mn>\n </msub>\n </mrow>\n <annotation> ${U}_{10}$</annotation>\n </semantics></math> and air-sea temperature difference <span></span><math>\n <semantics>\n <mrow>\n <mo>∆</mo>\n <mi>T</mi>\n </mrow>\n <annotation> $\\mathit{{\\increment}}T$</annotation>\n </semantics></math>. While <span></span><math>\n <semantics>\n <mrow>\n <msub>\n <mi>U</mi>\n <mn>10</mn>\n </msub>\n </mrow>\n <annotation> ${U}_{10}$</annotation>\n </semantics></math> roughly consistent between the two stations, significant <span></span><math>\n <semantics>\n <mrow>\n <mo>∆</mo>\n <mi>T</mi>\n </mrow>\n <annotation> $\\mathit{{\\increment}}T$</annotation>\n </semantics></math> discrepancies emerged, particularly along the parallel line connecting the two sites. Despite occasional variations at specific measurement points or times, the <span></span><math>\n <semantics>\n <mrow>\n <mtext>HS</mtext>\n </mrow>\n <annotation> $\\text{HS}$</annotation>\n </semantics></math> characteristics demonstrated statistical consistency between the two stations. Comparative analysis with the bulk algorithm indicated that bulk <span></span><math>\n <semantics>\n <mrow>\n <mtext>HS</mtext>\n </mrow>\n <annotation> $\\text{HS}$</annotation>\n </semantics></math> differences could partially explain observed <span></span><math>\n <semantics>\n <mrow>\n <mo>∆</mo>\n <mi>T</mi>\n </mrow>\n <annotation> $\\mathit{{\\increment}}T$</annotation>\n </semantics></math> variations. However, observed <span></span><math>\n <semantics>\n <mrow>\n <mtext>HS</mtext>\n </mrow>\n <annotation> $\\text{HS}$</annotation>\n </semantics></math> magnitudes substantially exceeded bulk estimates, and the heat flux exchange coefficients derived from observations differ by 1.6 times between the two stations. These findings highlight the necessity for enhanced high-resolution direct flux measurements to validate parameterization schemes.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 14","pages":""},"PeriodicalIF":4.6000,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115797","citationCount":"0","resultStr":"{\"title\":\"Observed Meso-Gamma Scale Variability of Air-Sea Sensible Heat Flux in a Coastal Region\",\"authors\":\"Sheng Chen, Siyuan Wu, Wenzheng Jiang, Fangli Qiao, Zhanli Wang\",\"doi\":\"10.1029/2025GL115797\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The meso-gamma scale variability of air-sea sensible heat flux <span></span><math>\\n <semantics>\\n <mrow>\\n <mtext>HS</mtext>\\n </mrow>\\n <annotation> $\\\\text{HS}$</annotation>\\n </semantics></math> was investigated using synchronized flux observations from two tower-based platforms within 10 km over coastal regions. Observations revealed statistically weak correlations between spatial <span></span><math>\\n <semantics>\\n <mrow>\\n <mtext>HS</mtext>\\n </mrow>\\n <annotation> $\\\\text{HS}$</annotation>\\n </semantics></math> variability and both 10 m wind speed <span></span><math>\\n <semantics>\\n <mrow>\\n <msub>\\n <mi>U</mi>\\n <mn>10</mn>\\n </msub>\\n </mrow>\\n <annotation> ${U}_{10}$</annotation>\\n </semantics></math> and air-sea temperature difference <span></span><math>\\n <semantics>\\n <mrow>\\n <mo>∆</mo>\\n <mi>T</mi>\\n </mrow>\\n <annotation> $\\\\mathit{{\\\\increment}}T$</annotation>\\n </semantics></math>. While <span></span><math>\\n <semantics>\\n <mrow>\\n <msub>\\n <mi>U</mi>\\n <mn>10</mn>\\n </msub>\\n </mrow>\\n <annotation> ${U}_{10}$</annotation>\\n </semantics></math> roughly consistent between the two stations, significant <span></span><math>\\n <semantics>\\n <mrow>\\n <mo>∆</mo>\\n <mi>T</mi>\\n </mrow>\\n <annotation> $\\\\mathit{{\\\\increment}}T$</annotation>\\n </semantics></math> discrepancies emerged, particularly along the parallel line connecting the two sites. Despite occasional variations at specific measurement points or times, the <span></span><math>\\n <semantics>\\n <mrow>\\n <mtext>HS</mtext>\\n </mrow>\\n <annotation> $\\\\text{HS}$</annotation>\\n </semantics></math> characteristics demonstrated statistical consistency between the two stations. Comparative analysis with the bulk algorithm indicated that bulk <span></span><math>\\n <semantics>\\n <mrow>\\n <mtext>HS</mtext>\\n </mrow>\\n <annotation> $\\\\text{HS}$</annotation>\\n </semantics></math> differences could partially explain observed <span></span><math>\\n <semantics>\\n <mrow>\\n <mo>∆</mo>\\n <mi>T</mi>\\n </mrow>\\n <annotation> $\\\\mathit{{\\\\increment}}T$</annotation>\\n </semantics></math> variations. However, observed <span></span><math>\\n <semantics>\\n <mrow>\\n <mtext>HS</mtext>\\n </mrow>\\n <annotation> $\\\\text{HS}$</annotation>\\n </semantics></math> magnitudes substantially exceeded bulk estimates, and the heat flux exchange coefficients derived from observations differ by 1.6 times between the two stations. These findings highlight the necessity for enhanced high-resolution direct flux measurements to validate parameterization schemes.</p>\",\"PeriodicalId\":12523,\"journal\":{\"name\":\"Geophysical Research Letters\",\"volume\":\"52 14\",\"pages\":\"\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2025-07-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115797\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Geophysical Research Letters\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL115797\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geophysical Research Letters","FirstCategoryId":"89","ListUrlMain":"https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL115797","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Observed Meso-Gamma Scale Variability of Air-Sea Sensible Heat Flux in a Coastal Region
The meso-gamma scale variability of air-sea sensible heat flux was investigated using synchronized flux observations from two tower-based platforms within 10 km over coastal regions. Observations revealed statistically weak correlations between spatial variability and both 10 m wind speed and air-sea temperature difference . While roughly consistent between the two stations, significant discrepancies emerged, particularly along the parallel line connecting the two sites. Despite occasional variations at specific measurement points or times, the characteristics demonstrated statistical consistency between the two stations. Comparative analysis with the bulk algorithm indicated that bulk differences could partially explain observed variations. However, observed magnitudes substantially exceeded bulk estimates, and the heat flux exchange coefficients derived from observations differ by 1.6 times between the two stations. These findings highlight the necessity for enhanced high-resolution direct flux measurements to validate parameterization schemes.
期刊介绍:
Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.