Jean-Baptiste Boulé, Jean de Bremond d'Ars, Vincent Courtillot, Marc Gèze, Dominique Gibert, Jean-Louis Le Mouël, Fernando Lopes, Alexis Maineult, Pierpaolo Zuddas
{"title":"论树木热自我调节的机制:一种同温观测","authors":"Jean-Baptiste Boulé, Jean de Bremond d'Ars, Vincent Courtillot, Marc Gèze, Dominique Gibert, Jean-Louis Le Mouël, Fernando Lopes, Alexis Maineult, Pierpaolo Zuddas","doi":"arxiv-2409.09765","DOIUrl":null,"url":null,"abstract":"What is certain is that surface temperatures around the globe vary\nconsiderably, regardless of the time scales or underlying causes. Since 1850,\nwe have observed an average increase in global surface temperature anomalies of\n1.2$^{\\circ}$ and a median increase of 0.7$^{\\circ}$: this overall difference\nmasks significant regional differences. Nearly 60\\% of the world's population\nnow lives in urban areas, where vegetation cover has been significantly\nreduced, despite the paradoxical fact that vegetation plays an important role\nin regulating the thermal environment (\\textit{eg} through the shading provided\nby tree canopies). Continuous electrical and thermal measurements of trees in a\nParisian grove (France) show and quantify that canopies are not the only\nprotectors against heat waves; we must also consider the role of tree trunks.\nIt is clear that these trunks probably regulate themselves, possibly by\nmodulating the uptake of groundwater, whose geothermal stability is well\nestablished at a depth of just one meter. This quantitative observation should\nnot be overlooked in the urban planning of our cities.","PeriodicalId":501270,"journal":{"name":"arXiv - PHYS - Geophysics","volume":"4 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"On the mechanism of thermal self-regulation of trees: a kind of homeothermic observation\",\"authors\":\"Jean-Baptiste Boulé, Jean de Bremond d'Ars, Vincent Courtillot, Marc Gèze, Dominique Gibert, Jean-Louis Le Mouël, Fernando Lopes, Alexis Maineult, Pierpaolo Zuddas\",\"doi\":\"arxiv-2409.09765\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"What is certain is that surface temperatures around the globe vary\\nconsiderably, regardless of the time scales or underlying causes. Since 1850,\\nwe have observed an average increase in global surface temperature anomalies of\\n1.2$^{\\\\circ}$ and a median increase of 0.7$^{\\\\circ}$: this overall difference\\nmasks significant regional differences. Nearly 60\\\\% of the world's population\\nnow lives in urban areas, where vegetation cover has been significantly\\nreduced, despite the paradoxical fact that vegetation plays an important role\\nin regulating the thermal environment (\\\\textit{eg} through the shading provided\\nby tree canopies). Continuous electrical and thermal measurements of trees in a\\nParisian grove (France) show and quantify that canopies are not the only\\nprotectors against heat waves; we must also consider the role of tree trunks.\\nIt is clear that these trunks probably regulate themselves, possibly by\\nmodulating the uptake of groundwater, whose geothermal stability is well\\nestablished at a depth of just one meter. This quantitative observation should\\nnot be overlooked in the urban planning of our cities.\",\"PeriodicalId\":501270,\"journal\":{\"name\":\"arXiv - PHYS - Geophysics\",\"volume\":\"4 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - Geophysics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2409.09765\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Geophysics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.09765","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
On the mechanism of thermal self-regulation of trees: a kind of homeothermic observation
What is certain is that surface temperatures around the globe vary
considerably, regardless of the time scales or underlying causes. Since 1850,
we have observed an average increase in global surface temperature anomalies of
1.2$^{\circ}$ and a median increase of 0.7$^{\circ}$: this overall difference
masks significant regional differences. Nearly 60\% of the world's population
now lives in urban areas, where vegetation cover has been significantly
reduced, despite the paradoxical fact that vegetation plays an important role
in regulating the thermal environment (\textit{eg} through the shading provided
by tree canopies). Continuous electrical and thermal measurements of trees in a
Parisian grove (France) show and quantify that canopies are not the only
protectors against heat waves; we must also consider the role of tree trunks.
It is clear that these trunks probably regulate themselves, possibly by
modulating the uptake of groundwater, whose geothermal stability is well
established at a depth of just one meter. This quantitative observation should
not be overlooked in the urban planning of our cities.