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1. Mismatches between soil and air temperature

Author

Vaccari, Francesco, Seipel, Tim, Kljun, Natascha, Radujković, Dajana, Crowther, Thomas, Grelle, Achim, Mondoni, Andrea, Finckh, Manfred, Wang, Yifeng, Abedi, Mehdi, Simpson, Elizabeth, Verheijen, Frank, Andres, Christian, Assis, Rafael, Descombes, Patrice, Manco, Antonio, Lens , Luc, Pitacco, Andrea, Erfanian, Mohammad, Phoenix, Gareth, Iwata, Hiroki, de Andrade, Ana, Medinets, Sergiy, Dušek, Jiří, Bruna, Josef, Svoboda, Miroslav, Aalto, Juha, Buysse, Pauline, Lynn , Joshua, Hylander, Kristoffer, Rubtsov, Alexey, Macek, Martin, Freeman, Erika, Venn, Susanna, Bauters, Marijn, Puchalka, Radoslaw, Feigenwinter, Iris, Mackenzie, Roy, Tanneberger, Franziska, Normand, Signe, Tomaselli, Marcello, Okello, Joseph, Alatalo, Juha, Scharnweber, Tobias, Aerts, Rien, Wang, Runxi, Meysman, Filip, Jónsdóttir, Ingibjörg, Dimarco, Romina, Vandvik , Vigdis, Penczykowski, Rachel, Guénard, Benoit, Nouvellon, Yann, Spasojevic, Marko, Svátek, Martin, Barthel, Matti, Stanisci, Angela, Yu, Zicheng, Nuñez, Martin, Cesarz, Simone, Van Meerbeek, Koenraad, Candan, Onur, Jucker, Tommaso, Ahmadian, Negar, Way, Robert, Ashcroft, Michael, Kolle, Olaf, Pitteloud, Camille, Høye, Toke, Montagnani, Leonardo, Vittoz, Pascal, Dolezal, Jiri, Goeckede, Mathias, Schmidt, Marius, Moiseev, Dmitry, Goded, Ignacio, Benito-Alonso, José-Luis, di Cella, Umberto, Convey, Peter, Lorite, Juan, Sagot, Clotilde, Bader, Maaike, Shekhar, Ankit, Porro, Francesco, Jastrzebowski, Szymon, Manca, Giovanni, Helfter, Carole, Exton, Dan, Smith, Stuart, Olejnik, Janusz, Cremonese, Edoardo, Pearse, William, Jump, Alistair, Pastor, Ada, Sarneel, Judith, Matula, Radim, Pauli, Harald, Stemkovski, Michael, Dick, Jan, Lohila, Annalea, Trouillier, Mario, Man, Matěj, Björk, Robert, Sewerniak, Piotr, Géron, Charly, Bon, Matteo, Santos, Cinthya, Curtis, Robin, Kollár, Jozef, Vives-Ingla, Maria, Pio, Casimiro, DIAZ, Jose, Boike, Julia, Basham, Edmund, Liljebladh, Bengt, Rossi, Graziano, Siqueira, David, Mosedale, Jonathan, Varlagin, Andrej, Máliš, František, Laska, Kamil, RENAULT, David, Verbeeck, Hans, Heinesch, Bernard, García, María, Zhang, Zhaochen, Sidenko, Nikita, Poyatos, Rafael, Bjornsdottir, Katrin, Hrbacek, Filip, Andrews, Christopher, Senior, Rebecca, Jactel, Hervé, Wilmking, Martin, Choler, Philippe, Aschero, Valeria, Naujokaitis-Lewis, Ilona, Lamprecht, Andrea, Jimenez, Juan, Khuroo, Anzar, Phartyal, Shyam, Moiseev, Pavel, García, Rafael, Zyryanov, Viacheslav, Kemppinen, Julia, Yang , Yan, Van Geel, Maarten, Nardino, Marianna, Malfasi, Francesco, Haider, Sylvia, Hamid, Maroof, Leihy, Rachel, de Pablo, Miguel, Rossi, Christian, Urban, Anastasiya, Erschbamer, Brigitta, Bell, Michael, Marchesini, Luca, Urbaniak, Marek, Zong, Shengwei, Ammann, Christof, Bahalkeh, Khadijeh, Smiljanic, Marko, Uogintas, Domas, Xenakis, Georgios, Sitková, Zuzana, Stoll, Stefan, Haase, Peter, Hermanutz, Luise, Peichl, Matthias, Altman, Jan, Verbruggen, Erik, Čiliak, Marek, Thomas, Andrew, Assmann, Jakob, Tyystjärvi, Vilna, Panov, Alexey, Milbau, Ann, Nagy, Laszlo, Kelly, Julia, Pärtel, Meelis, Campoe, Otávio, Myers, Jonathan, Muffler, Lena, Juszczak, Radoslaw, Hoffrén, Raúl, Pavelka, Marian, Plichta, Roman, Munoz-Rojas, Miriam, Niittynen, Pekka, Daskalova, Gergana, Maclean, Ilya, Alexander, Jake, Carnicer, Jofre, Herbst, Mathias, Larson, Christian, Cannone, Nicoletta, Arzac, Alberto, Ujházyová, Mariana, Jentsch, Anke, Penuelas, Josep, Nosetto, Marcelo, Chown, Steven, Kanka, Róbert, Walz, Josefine, Rixen, Christian, Fernández-Pascual, Eduardo, Steinbauer, Klaus, Zellweger, Florian, Frei, Esther, Scott, Tony, Erickson, Todd, Luoto, Miska, Wedegärtner, Ronja, Bravo, Jhonatan, Ujházy, Karol, Zhang, Jian, Järveoja, Järvi, Nijs, Ivan, Olesen, Jørgen, Hepenstrick, Daniel, Greenwood, Sarah, Buchmann, Nina, von Oppen, Jonathan, Deronde, Bart, Merinero, Sonia, Semenchuk, Philipp, Myers-Smith, Isla, Steinwandter, Michael, Dengler, Jürgen, Hammerle, Albin, Kovács, Bence, Forte, Tai, Haugum, Siri, Klemedtsson, Leif, Homeier, Jürgen, Calzado, M., Chojnicki, Bogdan, Ardö, Jonas, Scholten, Thomas, Risch, Anita, Robroek, Bjorn, Larson, Keith, Nilsson, Matts, Higgens, Rebecca, Magliulo, Enzo, Gharun, Mana, Fenu, Giuseppe, Herberich, Maximiliane, Newling, Emily, Vangansbeke, Pieter, Orsenigo, Simone, Souza, José, Bokhorst, Stef, Knohl, Alexander, Spicher, Fabien, Di Cecco, Valter, Ogée, Jérôme, Ursu, Tudor-Mihai, Rocha, Adrian, Dorrepaal, Ellen, Björkman, Mats, Kreyling, Juergen, Treier, Urs, van den Hoogen, Johan, Loubet, Benjamin, Opedal, Øystein, Bazzichetto, Manuele, Vitale, Luca, Blonder, Benjamin, Ejtehadi, Hamid, Speed, James, Boeckx, Pascal, Ziemblińska, Klaudia, Dahlberg, C., Carbognani, Michele, Gobin, Anne, Remmers, Wolfram, Arriga, Nicola, Thomas, Haydn, Marciniak, Felipe, Remmele, Sabine, Collier, Laura, Wingate, Lisa, Seeber, Julia, Cooper, Elisabeth, Steinbrecher, Rainer, Barrio, Isabel, Hampe, Arndt, Ogaya, Romà, Michaletz, Sean, Moriana-Armendariz, Mikel, le Maire, Guerric, Abdalaze, Otar, Guillemot, Joannès, Mörsdorf, Martin, Canessa, Rafaella, Tanentzap, Andrew, Backes, Amanda, Poulenard, Jérôme, De Frenne, Pieter, Graae, Bente, Yu, Kailiang, Palaj, Andrej, Meeussen, Camille, Mazzolari, Ana, Casanova-Katny, Angélica, Manolaki, Paraskevi, Niessner, Armin, Van de Vondel, Stijn, Wohlfahrt, Georg, Fuentes-Lillo, Eduardo, Bailey, Joseph, Petraglia, Alessandro, Kašpar, Vít, Goulding, Keith, Somers, Ben, Schwartz, Naomi, Smith-Tripp, Sarah, Lenoir, Jonathan, de Cássia Guimarães Mesquita, Rita, Aartsma, Peter, Urban, Josef, Eklundh, Lars, Roupsard, Olivier, Curasi, Salvatore, Greise, Caroline, Ferlian, Olga, Randall, Krystal, Camargo, José, Meusburger, Katrin, Siebicke, Lukas, Ueyama, Masahito, Eisenhauer, Nico, Brum, Barbara, Kotowska, Martyna, Stiegler, Christian, Kazakis, George, Hörtnagl, Lukas, Berauer, Bernd, Jackowicz-Korczynski, Marcin, Winkler, Manuela, Hik, David, Pauchard, Aníbal, Fazlioglu, Fatih, Contador, Tamara, Turtureanu, Pavel, Souza, Bartolomeu, Manise, Tanguy, Cutini, Maurizio, Benavides, Juan, Stephan, Jörg, Tutton, Rosamond, Di Musciano, Michele, Barros, Agustina, Kopecký, Martin, Della Chiesa, Stefano, Ghosn, Dany, Haesen, Stef, Ahrends, Antje, Wipf, Sonja, Zimmermann, Reiner, Tagesson, Torbern, Maier, Regine, Wild, Jan, Tielbörger, Katja, Zhao, Peng, Prokushkin, Anatoly, Kobler, Johannes, Klisz, Marcin, Pușcaș, Mihai, Veen, G., Villar, Luis, Bjerke, Jarle, Wilkinson, Matthew, Allonsius, Camille, Dias, Arildo, Six, Johan, Gigauri, Khatuna, Pampuch, Timo, Theurillat, Jean-Paul, Cifuentes, Edgar, Portillo-Estrada, Miguel, Hederová, Lucia, Klinges, David, Govaert, Sanne, Scheffers, Brett, Eugster, Werner, Guglielmin, Mauro, Medinets, Volodymyr, Lang, Simone, Pellissier, Loïc, Niedrist, Georg, Fanin, Nicolas, Nicklas, Lena, Schmeddes, Jonas, Veenendaal, Elmar, Barančok, Peter, Weigel, Robert, van den Brink, Liesbeth, Sørensen, Mia, Gottschall, Felix, Ewers, Robert, Halbritter, Aud, and Lembrechts, Jonas

Subjects
bepress|Physical Sciences and Mathematics, bepress|Physical Sciences and Mathematics|Earth Sciences|Soil Science, bepress|Life Sciences, bepress|Physical Sciences and Mathematics|Oceanography and Atmospheric Sciences and Meteorology|Climate, bepress|Physical Sciences and Mathematics|Oceanography and Atmospheric Sciences and Meteorology, bepress|Physical Sciences and Mathematics|Earth Sciences, bepress|Physical Sciences and Mathematics|Environmental Sciences, bepress|Life Sciences|Ecology and Evolutionary Biology, bepress|Physical Sciences and Mathematics|Environmental Sciences|Environmental Monitoring
Abstract

Research in environmental science relies heavily on global climatic grids derived from estimates of air temperature at around 2 meter above ground1-3. These climatic grids however fail to reflect conditions near and below the soil surface, where critical ecosystem functions such as soil carbon storage are controlled and most biodiversity resides4-8. By using soil temperature time series from over 8500 locations across all of the world’s terrestrial biomes4, we derived global maps of soil temperature-related variables at 1 km resolution for the 0–5 and 5–15 cm depth horizons. Based on these maps, we show that mean annual soil temperature differs markedly from the corresponding 2 m gridded air temperature, by up to 10°C, with substantial variation across biomes and seasons. Soils in cold and/or dry biomes are annually substantially warmer (3.6°C ± 2.3°C) than gridded air temperature, whereas soils in warm and humid environments are slightly cooler (0.7 ± 2.3°C). As a result, annual soil temperature varies less (by 17%) across the globe than air temperature. The effect of macroclimatic conditions on the difference between soil and air temperature highlights the importance of considering that macroclimate warming may not result in the same level of soil temperature warming. Similarly, changes in precipitation could alter the relationship between soil and air temperature, with implications for soil-atmosphere feedbacks9. Our results underpin that the impacts of climate and climate change on biodiversity and ecosystem functioning are inaccurately assessed when air rather than soil temperature is used, especially in cold environments.

Published
2021

3. Climatically controlled reproduction drives interannual growth variability in a temperate tree species

Author

Hacket-Pain, Andrew J., Ascoli, Davide, Vacchiano, Giorgio, Biondi, Franco, Cavin, Liam, Conedera, Marco, Drobyshev, Igor, Liñán, Isabel Dorado, Friend, Andrew D., Grabner, Michael, Hartl, Claudia, Kreyling, Juergen, Lebourgeois, François, Levanič, Tom, Menzel, Annette, van der Maaten, Ernst, van der Maaten-Theunissen, Marieke, Muffler, Lena, Motta, Renzo, Roibu, Catalin-Constantin, Popa, Ionel, Scharnweber, Tobias, Weigel, Robert, Wilmking, Martin, and Zang, Christian S.

Subjects
ddc
Published
2018

5. Climatically controlled reproduction drives interannual growth variability in a temperate tree species

Author

Hacket-Pain, Andrew J, Ascoli, Davide, Vacchiano, Giorgio, Biondi, Franco, Cavin, Liam, Conedera, Marco, Drobyshev, Igor, Liñán, Isabel Dorado, Friend, Andrew D, Grabner, Michael, Hartl, Claudia, Kreyling, Juergen, Lebourgeois, François, Levanič, Tom, Menzel, Annette, Van Der Maaten, Ernst, Van Der Maaten-Theunissen, Marieke, Muffler, Lena, Motta, Renzo, Roibu, Catalin-Constantin, Popa, Ionel, Scharnweber, Tobias, Weigel, Robert, Wilmking, Martin, and Zang, Christian S

Subjects
Dendrochronology, Fagus sylvatica, Climate Change, Reproduction, drought, 15. Life on land, structural equation modelling, Forests, masting, European beech, Trees, 13. Climate action, SEM, forest growth, Fagus, path analysis, FOS: Medical biotechnology, trade-off
Abstract

Climatically controlled allocation to reproduction is a key mechanism by which climate influences tree growth and may explain lagged correlations between climate and growth. We used continent-wide datasets of tree-ring chronologies and annual reproductive effort in Fagus sylvatica from 1901 to 2015 to characterise relationships between climate, reproduction and growth. Results highlight that variable allocation to reproduction is a key factor for growth in this species, and that high reproductive effort ('mast years') is associated with stem growth reduction. Additionally, high reproductive effort is associated with previous summer temperature, creating lagged climate effects on growth. Consequently, understanding growth variability in forest ecosystems requires the incorporation of reproduction, which can be highly variable. Our results suggest that future response of growth dynamics to climate change in this species will be strongly influenced by the response of reproduction.

6. Global maps of soil temperature

Author

Lembrechts, Jonas J, Van Den Hoogen, Johan, Aalto, Juha, Ashcroft, Michael B, De Frenne, Pieter, Kemppinen, Julia, Kopecký, Martin, Luoto, Miska, Maclean, Ilya MD, Crowther, Thomas W, Bailey, Joseph J, Haesen, Stef, Klinges, David H, Niittynen, Pekka, Scheffers, Brett R, Van Meerbeek, Koenraad, Aartsma, Peter, Abdalaze, Otar, Abedi, Mehdi, Aerts, Rien, Ahmadian, Negar, Ahrends, Antje, Alatalo, Juha M, Alexander, Jake M, Allonsius, Camille Nina, Altman, Jan, Ammann, Christof, Andres, Christian, Andrews, Christopher, Ardö, Jonas, Arriga, Nicola, Arzac, Alberto, Aschero, Valeria, Assis, Rafael L, Assmann, Jakob Johann, Bader, Maaike Y, Bahalkeh, Khadijeh, Barančok, Peter, Barrio, Isabel C, Barros, Agustina, Barthel, Matti, Basham, Edmund W, Bauters, Marijn, Bazzichetto, Manuele, Marchesini, Luca Belelli, Bell, Michael C, Benavides, Juan C, Benito Alonso, José Luis, Berauer, Bernd J, Bjerke, Jarle W, Björk, Robert G, Björkman, Mats P, Björnsdóttir, Katrin, Blonder, Benjamin, Boeckx, Pascal, Boike, Julia, Bokhorst, Stef, Brum, Bárbara NS, Brůna, Josef, Buchmann, Nina, Buysse, Pauline, Camargo, José Luís, Campoe, Otávio C, Candan, Onur, Canessa, Rafaella, Cannone, Nicoletta, Carbognani, Michele, Carnicer, Jofre, Casanova-Katny, Angélica, Cesarz, Simone, Chojnicki, Bogdan, Choler, Philippe, Chown, Steven L, Cifuentes, Edgar F, Čiliak, Marek, Contador, Tamara, Convey, Peter, Cooper, Elisabeth J, Cremonese, Edoardo, Curasi, Salvatore R, Curtis, Robin, Cutini, Maurizio, Dahlberg, C Johan, Daskalova, Gergana N, De Pablo, Miguel Angel, Della Chiesa, Stefano, Dengler, Jürgen, Deronde, Bart, Descombes, Patrice, Di Cecco, Valter, Di Musciano, Michele, Dick, Jan, Dimarco, Romina D, Dolezal, Jiri, Dorrepaal, Ellen, Dušek, Jiří, Eisenhauer, Nico, Eklundh, Lars, Erickson, Todd E, Erschbamer, Brigitta, Eugster, Werner, Ewers, Robert M, Exton, Dan A, Fanin, Nicolas, Fazlioglu, Fatih, Feigenwinter, Iris, Fenu, Giuseppe, Ferlian, Olga, Fernández Calzado, M Rosa, Fernández-Pascual, Eduardo, Finckh, Manfred, Higgens, Rebecca Finger, Forte, T'ai GW, Freeman, Erika C, Frei, Esther R, Fuentes-Lillo, Eduardo, García, Rafael A, García, María B, Géron, Charly, Gharun, Mana, Ghosn, Dany, Gigauri, Khatuna, Gobin, Anne, Goded, Ignacio, Goeckede, Mathias, Gottschall, Felix, Goulding, Keith, Govaert, Sanne, Graae, Bente Jessen, Greenwood, Sarah, Greiser, Caroline, Grelle, Achim, Guénard, Benoit, Guglielmin, Mauro, Guillemot, Joannès, Haase, Peter, Haider, Sylvia, Halbritter, Aud H, Hamid, Maroof, Hammerle, Albin, Hampe, Arndt, Haugum, Siri V, Hederová, Lucia, Heinesch, Bernard, Helfter, Carole, Hepenstrick, Daniel, Herberich, Maximiliane, Herbst, Mathias, Hermanutz, Luise, Hik, David S, Hoffrén, Raúl, Homeier, Jürgen, Hörtnagl, Lukas, Høye, Toke T, Hrbacek, Filip, Hylander, Kristoffer, Iwata, Hiroki, Jackowicz-Korczynski, Marcin Antoni, Jactel, Hervé, Järveoja, Järvi, Jastrzębowski, Szymon, Jentsch, Anke, Jiménez, Juan J, Jónsdóttir, Ingibjörg S, Jucker, Tommaso, Jump, Alistair S, Juszczak, Radoslaw, Kanka, Róbert, Kašpar, Vít, Kazakis, George, Kelly, Julia, Khuroo, Anzar A, Klemedtsson, Leif, Klisz, Marcin, Kljun, Natascha, Knohl, Alexander, Kobler, Johannes, Kollár, Jozef, Kotowska, Martyna M, Kovács, Bence, Kreyling, Juergen, Lamprecht, Andrea, Lang, Simone I, Larson, Christian, Larson, Keith, Laska, Kamil, Le Maire, Guerric, Leihy, Rachel I, Lens, Luc, Liljebladh, Bengt, Lohila, Annalea, Lorite, Juan, Loubet, Benjamin, Lynn, Joshua, Macek, Martin, Mackenzie, Roy, Magliulo, Enzo, Maier, Regine, Malfasi, Francesco, Máliš, František, Man, Matěj, Manca, Giovanni, Manco, Antonio, Manise, Tanguy, Manolaki, Paraskevi, Marciniak, Felipe, Matula, Radim, Mazzolari, Ana Clara, Medinets, Sergiy, Medinets, Volodymyr, Meeussen, Camille, Merinero, Sonia, Mesquita, Rita De Cássia Guimarães, Meusburger, Katrin, Meysman, Filip, Michaletz, Sean T, Milbau, Ann, Moiseev, Dmitry, Moiseev, Pavel, Mondoni, Andrea, Monfries, Ruth, Montagnani, Leonardo, Moriana-Armendariz, Mikel, Morra Di Cella, Umberto, Mörsdorf, Martin, Mosedale, Jonathan R, Muffler, Lena, Muñoz-Rojas, Miriam, Myers, Jonathan A, Myers-Smith, Isla H, Nagy, Laszlo, Nardino, Marianna, Naujokaitis-Lewis, Ilona, Newling, Emily, Nicklas, Lena, Niedrist, Georg, Niessner, Armin, Nilsson, Mats B, Normand, Signe, Nosetto, Marcelo D, Nouvellon, Yann, Nuñez, Martin A, Ogaya, Romà, Ogée, Jérôme, Okello, Joseph, Olejnik, Janusz, Olesen, Jørgen Eivind, Opedal, Øystein H, Orsenigo, Simone, Palaj, Andrej, Pampuch, Timo, Panov, Alexey V, Pärtel, Meelis, Pastor, Ada, Pauchard, Aníbal, Pauli, Harald, Pavelka, Marian, Pearse, William D, Peichl, Matthias, Pellissier, Loïc, Penczykowski, Rachel M, Penuelas, Josep, Petit Bon, Matteo, Petraglia, Alessandro, Phartyal, Shyam S, Phoenix, Gareth K, Pio, Casimiro, Pitacco, Andrea, Pitteloud, Camille, Plichta, Roman, Porro, Francesco, Portillo-Estrada, Miguel, Poulenard, Jérôme, Poyatos, Rafael, Prokushkin, Anatoly S, Puchalka, Radoslaw, Pușcaș, Mihai, Radujković, Dajana, Randall, Krystal, Ratier Backes, Amanda, Remmele, Sabine, Remmers, Wolfram, Renault, David, Risch, Anita C, Rixen, Christian, Robinson, Sharon A, Robroek, Bjorn JM, Rocha, Adrian V, Rossi, Christian, Rossi, Graziano, Roupsard, Olivier, Rubtsov, Alexey V, Saccone, Patrick, Sagot, Clotilde, Sallo Bravo, Jhonatan, Santos, Cinthya C, Sarneel, Judith M, Scharnweber, Tobias, Schmeddes, Jonas, Schmidt, Marius, Scholten, Thomas, Schuchardt, Max, Schwartz, Naomi, Scott, Tony, Seeber, Julia, Segalin De Andrade, Ana Cristina, Seipel, Tim, Semenchuk, Philipp, Senior, Rebecca A, Serra-Diaz, Josep M, Sewerniak, Piotr, Shekhar, Ankit, Sidenko, Nikita V, Siebicke, Lukas, Siegwart Collier, Laura, Simpson, Elizabeth, Siqueira, David P, Sitková, Zuzana, Six, Johan, Smiljanic, Marko, Smith, Stuart W, Smith-Tripp, Sarah, Somers, Ben, Sørensen, Mia Vedel, Souza, José João LL, Souza, Bartolomeu Israel, Souza Dias, Arildo, Spasojevic, Marko J, Speed, James DM, Spicher, Fabien, Stanisci, Angela, Steinbauer, Klaus, Steinbrecher, Rainer, Steinwandter, Michael, Stemkovski, Michael, Stephan, Jörg G, Stiegler, Christian, Stoll, Stefan, Svátek, Martin, Svoboda, Miroslav, Tagesson, Torbern, Tanentzap, Andrew J, Tanneberger, Franziska, Theurillat, Jean-Paul, Thomas, Haydn JD, Thomas, Andrew D, Tielbörger, Katja, Tomaselli, Marcello, Treier, Urs Albert, Trouillier, Mario, Turtureanu, Pavel Dan, Tutton, Rosamond, Tyystjärvi, Vilna A, Ueyama, Masahito, Ujházy, Karol, Ujházyová, Mariana, Uogintas, Domas, Urban, Anastasiya V, Urban, Josef, Urbaniak, Marek, Ursu, Tudor-Mihai, Vaccari, Francesco Primo, Van De Vondel, Stijn, Van Den Brink, Liesbeth, Van Geel, Maarten, Vandvik, Vigdis, Vangansbeke, Pieter, Varlagin, Andrej, Veen, GF, Veenendaal, Elmar, Venn, Susanna E, Verbeeck, Hans, Verbrugggen, Erik, Verheijen, Frank GA, Villar, Luis, Vitale, Luca, Vittoz, Pascal, Vives-Ingla, Maria, Von Oppen, Jonathan, Walz, Josefine, Wang, Runxi, Wang, Yifeng, Way, Robert G, Wedegärtner, Ronja EM, Weigel, Robert, Wild, Jan, Wilkinson, Matthew, Wilmking, Martin, Wingate, Lisa, Winkler, Manuela, Wipf, Sonja, Wohlfahrt, Georg, Xenakis, Georgios, Yang, Yan, Yu, Zicheng, Yu, Kailiang, Zellweger, Florian, Zhang, Jian, Zhang, Zhaochen, Zhao, Peng, Ziemblińska, Klaudia, Zimmermann, Reiner, Zong, Shengwei, Zyryanov, Viacheslav I, Nijs, Ivan, and Lenoir, Jonathan

Subjects
soil temperature, Climate Change, Temperature, soil-dwelling organisms, Microclimate, 15. Life on land, weather stations, near-surface temperatures, Soil, bioclimatic variables, 13. Climate action, temperature offset, global maps, Ecosystem
Abstract

Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic variables at a 1-km2 resolution for 0-5 and 5-15 cm soil depth. These maps were created by calculating the difference (i.e. offset) between in situ soil temperature measurements, based on time series from over 1200 1-km2 pixels (summarized from 8519 unique temperature sensors) across all the world's major terrestrial biomes, and coarse-grained air temperature estimates from ERA5-Land (an atmospheric reanalysis by the European Centre for Medium-Range Weather Forecasts). We show that mean annual soil temperature differs markedly from the corresponding gridded air temperature, by up to 10°C (mean = 3.0 ± 2.1°C), with substantial variation across biomes and seasons. Over the year, soils in cold and/or dry biomes are substantially warmer (+3.6 ± 2.3°C) than gridded air temperature, whereas soils in warm and humid environments are on average slightly cooler (-0.7 ± 2.3°C). The observed substantial and biome-specific offsets emphasize that the projected impacts of climate and climate change on near-surface biodiversity and ecosystem functioning are inaccurately assessed when air rather than soil temperature is used, especially in cold environments. The global soil-related bioclimatic variables provided here are an important step forward for any application in ecology and related disciplines. Nevertheless, we highlight the need to fill remaining geographic gaps by collecting more in situ measurements of microclimate conditions to further enhance the spatiotemporal resolution of global soil temperature products for ecological applications.

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