State of the Climate in 2018

Ades, Melanie; Adler, Robert F.; Aldeco, Laura S.; Alejandra, Gabriela; Alfaro, Eric J.; Aliaga-Nestares, Vannia; Allan, Richard P.; Allan, Rob; Alves, Lincoln M.; Amador, Jorge A.; Andersen, Jonas Kvist; Anderson, J.; Arndt, Derek S.; Arosio, Carlo; Arrigo, Kevin R.; Azorín-Molina, César; Bardin, M. Yu.; Barichivich, Jonathan; Barreira, Sandra; Baxter, Stephen; Beck, Hylke E.; Becker, Andreas; Bell, Gerald D.; Bellouin, Nicolas; Belmont, M.R.; Benedetti, Angela; Benedict, Imme; Bernhard, Germar; Berrisford, Paul; Berry, David I.; Bettio, Lynette; Bhatt, Uma S.; Biskaborn, Boris K.; Bissolli, Peter; Bjella, K.; Bjerke, Jarle W.; Blake, Eric S.; Blenkinsop, Stephen; Blunden, Jessica; Bock, Olivier; Bosilovich, Michael G.; Boucher, Oliviér; Box, Jason E.; Boyer, Tim; Braathen, Geir; Bringas, Francis; Bromwich, David H.; Brown, Alrick; Brown, Ross; Brown, Timothy J.; Buehler, Stefan; Cáceres, Luis Antonio Cáceres; Calderón, Blanca; Camargo, Suzana J.; Campbell, Jayaka D.; Diaz, Diego A. Campos; Cappelen, John; Carrea, Laura; Carrier, Seth B.; Carter, Brendan R.; Castro, Anabel; Cetinić, Ivona; Chambers, D. P.; Lin, Chen; Cheng, Lijing; Cheng, Vincent Y. S.; Christiansen, Hanne H.; Christy, John R.; Chung, Eui‐Seok; Claus, Federico; Clem, Kyle R.; Coelho, Caio A. S.; Coldewey‐Egbers, Melanie; Colwell, Steve; Cooper, O. R.; Cosca, Cathy; Covey, Curt; Coy, Lawrence; Dávila, Cristina P.; Davis, Sean; Eyto, Elvira de; Jeu, R. A. M. de; Laat, Jos de; Decharme, Bertrand; DeGasperi, Curtis L.; Degenstein, D. A.; Demircan, Mesut; Derksen, Chris; Dhurmea, K. R.; Girolamo, Larry Di; Diamond, Howard J.; Diaz, Eliecer; Diniz, Fransisco A.; Dlugokencky, E. J.; Dohan, Kathleen; Dokulil, Martin T.; Dolman, A. J.; Domingues, Catia M.; Domingues, Ricardo; Donat, Markus G.; Dorigo, Wouter; Drozdov, Dmitry; Druckenmiller, Matthew L.; Dunn, Robert; Durre, Imke; Dutton, G. S.; ElKharrim, M.; Elkins, James W.; Epstein, Howard E.; Espinoza, Jhan Carlo; Famiglietti, J. S.; Farrell, S. L.; Fausto, Robert S.; Feely, Richard A.; Feng, Zhe; Fenimore, Chris; Fettweis, Xavier; Fioletov, Vitali; Flemming, Johannes; Fogt, Ryan L.; Forbes, Bruce C.; Foster, Michael J.; Francis, Shannon; Franz, Bryan A.; Frey, R.; Frith, S. M.; Froidevaux, L.; Ganter, Catherine; Garforth, Judith; Gerland, Sebastian; Gilson, John; Gleason, Karin; Gobron, Nadine; Goetz, Scott J.; Goldenberg, Stanley B.; Goñi, Gustavo; Gray, Alison R.; Grooß, J. U.; Gruber, A.; Gu, Guojun; Guard, Charles “Chip” P.; Gupta, S. K.; Gutiérrez, Dimitri; Haas, Christian; Hagos, Samson; Hahn, Sebastian; Haimberger, Leo; Hall, B. D.; Halpert, Michael S.; Hamlington, B. D.; Hanna, Edward; Hanssen-Bauer, Inger; Harris, Ian; Hazeleger, Wilco; He, Qiong; Heidinger, A. K.; Heim, Richard R.; Hemming, Debbie; Hendricks, Stefan; Hernández, Rafael; Hersbach, Hans; Hidalgo, Hugo G.; Ho, Shu‐Peng; Holmes, Robert M.; Hu, Chuanmin; Huang, Boyin; Hubbard, Katherine A.; Hubert, D.; Hurst, D. F.; Ialongo, Iolanda; Ijampy, J. A.; Inness, Antje; Isaac, Victor; Isaksen, Ketil; Ishii, Masayoshi; Jeffries, Martin O.; Jevrejeva, Svetlana; Jia, Guo; Jiménez, Carlos; Jin, Xiangze; John, Viju O.; Johnsen, Bjørn; Johnson, Gregory C.; Johnson, Kenneth S.; Johnson, Bryan; Jones, Philip; Jumaux, Guillaume; Kabidi, Khadija; Kaiser, J. W.; Karakoylu, E.; Karlsen, Stein Rune; Karnauskas, Mandy; Kato, Seiji; Kazemi, A.; Kelble, Christopher R.; Keller, Linda M.; Kennedy, John J.; Kholodov, A. L.; Khoshkam, Mahbobeh; Kidd, Robert B.; Killick, Rachel; Kim, Hyungjun; Kim, S. J.; King, Andrew D.; King, Brian; Kipling, Zak; Klotzbach, Philip J.; Knaff, John A.; Korhonen, Johanna; Korshunova, Natalia N.; Kramarova, N. A.; Kratz, David P.; Kruger, Andries; Kruk, Michael C.; Krumpen, Thomas; Labbé, L.; Ladd, Carol; Lakatos, Mónika; Lakkala, Kaisa; Lander, Mark A.; Landschützer, Peter; Landsea, Chris; Lareau, Neil P.; Lavado‐Casimiro, Waldo; Lazzara, Matthew A.; Lee, T. C.; Leuliette, E. W.; L’Heureux, Michelle; Li, Bailing; Li, Tim; Lieser, Jan L.; Lim, J.; Lin, I‐I; Liu, Hongxing; Locarnini, R. A.; Loeb, Norman G.; Long, Craig S.; López, Luis; Lorrey, Andrew; Loyola, Diego; Lumpkin, Rick; Luo, Jie; Luojus, Kari; Lyman, John M.; Малкова, Г. В.; Manney, G. L.; Marchenko, S. S.; Marengo, José A.; Marín, Dora; Collow, Allison B. Marquardt; Marra, John J.; Marszelewski, Włodzimierz; Martens, Brecht; Martínez-Güingla, Rodney; Massom, Robert A.; May, Linda; Mayer, Michael; Mazloff, Matthew R.; McBride, Charlotte; McCabe, Matthew F.; McClelland, J. W.; McEvoy, Daniel J.; McGree, Simon; McVicar, Tim R.; Mears, C. A.; Meier, Walter N.; Meijers, Andrew J. S.; Mekonnen, Ademe; Tsidu, Gizaw Mengistu; Menzel, W. Paul; Merchant, Christopher J.; Meredith, Michael P.; Merrifield, M. A.; Miller, Ben; Miralles, Diego G.; Misevicius, Noelia; Mitchum, Gary T.; Mochizuki, Yasushi; Monselesan, Didier; Montzka, S. A.; Mora, Natali; Morice, Colin; Mosquera-Vásquez, K.; Mostafa, Awatif E.; Mote, Thomas L.; Mudryk, Lawrence; Mühle, Jens; Mullan, A. Brett; Müller, Rolf; Myneni, Ranga B.; Nash, Eric R.; Nauslar, Nicholas J.; Nerem, R. S.; Newman, Paul A.; Nicolas, Julien P.; Nieto, Juan J.; Noetzli, Jeannette; Osborn, Timothy J.; Overland, James E.; Oyunjargal, Lamjav; Park, T.; Pasch, Richard J.; Ramírez, Reynaldo Pascual; Saavedra, María Asunción Pastor; Paterson, Andrew M.; Pearce, Petra R.; Pelto, Mauri; Perovich, D. K.; Petropavlovskikh, Irina; Pezza, Alexandre Bernardes; Phillips, Coda; Phillips, David W.; Phoenix, Gareth K.; Pinty, B.; Pitts, Mıchael; Po‐Chedley, Stephen; Polashenski, Chris; Preimesberger, Wolfgang; Purkey, Sarah G.; Quispe, Nelson; Rajeevan, M.; Rakotoarimalala, C. L.; Ramos, Andrea M.; Ramos, Isabel Sánchez; Randel, William J.; Raynolds, Martha K.; Reagan, James R.; Reid, Phillip; Reimer, Christoph; Rémy, Samuel; Revadekar, J. V.; Richardson, A. D.; Richter‐Menge, Jacqueline A.; Ricker, Robert; Ripaldi, A.; Robinson, David A.; Rodell, M.; Camino, Ernesto Rodríguez; Romanovsky, V. E.; Ronchail, Josyane; Rosenlof, Karen H.; Rösner, Benajamin; Roth, Chris; Rozanov, A.; Rusak, James A.; Rustemeier, Elke; Rutishauser, This; Sallée, Jean Baptiste; Sánchez-Lugo, Ahira; Santee, M. L.; Sawaengphokhai, P.; Sayouri, Amal; Scambos, Ted; Scanlon, Tracy; Scardilli, Alvaro S.; Schenzinger, Verena; Schladow, S. Geoffey; Schmid, Claudia; Schmid, Martin; Schoeneich, Philippe; Schreck, Carl J.; Selkirk, Henry B.; Şensoy, Serhat; Shi, Lei; Shiklomanov, A. I.; Shiklomanov, N. I.; Shimpo, Akihiko; Shuman, Christopher A.; Siegel, David A.; Sima, Fatou; Simmons, A. J.; Smeets, C. J. P. P.; Smith, Adam B.; Smith, Sharon L.; Soden, Brian J.; Sofieva, Viktoria; Sparks, T.; Spence, Jacqueline; Spencer, Robert G. M.; Spillane, Sandra; Srivastava, A. K.; Stabeno, Phyllis J.; Stackhouse, Paul W.; Stammerjohn, Sharon; Stanitski, Diane M.; Steinbrecht, Wolfgang; Stella, José Luis; Stengel, Martin; Stephenson, Tannecia S.; Strahan, S. E.; Streeter, Casey; Streletskiy, D. A.; Sun‐Mack, Sunny; Suslova, Anya; Sutton, Adrienne J.; Swart, Sebastiann; Sweet, William; Takahashi, Kenneth S.; Tank, Suzanne E.; Taylor, Michael A.; Tedesco, Marco; Thackeray, Stephen J.; Thompson, P. R.; Timbal, Bertrand; Timmermans, M. L.; Tobin, Skie; Tømmervik, Hans; Tourpali, Kleareti; Trachte, Katja; Tretiakov, M.; Trewin, Blair; Triñanes, Joaquín; Trotman, Adrian; Tschudi, M. A.; Tye, Mari R.; As, Dirk van; Wal, R. S. W. van de; A, Ronald van der; Schalie, Robin van der; Schrier, Gerard van der; Werf, Guido R. van der; Heerwaarden, Chiel C. van; Meerbeeck, Cédric J. Van; Verburg, Piet; Vieira, Gonçalo; Vincent, Lucie A.; Vömel, H.; Vose, Russell S.; Walker, Donald A.; Walsh, John E.; Wang, Bin; Wang, Hui; Wang, Lei; Wang, M.; Wang, Mengqiu; Wang, Ray; Wang, Sheng-Hung; Wanninkhof, Rik; Watanabe, Shohei; Weber, Mark; Webster, Melinda; Weerts, Albrecht; Weller, Robert A.; Westberry, T. K.; Weyhenmeyer, Gesa A.; Widlansky, M. J.; Wijffels, Susan E.; Wilber, Anne C.; Wild, Jeanette D.; Willett, Kate M.; Wong, Takmeng; Wood, Eric F.; Woolway, R. Iestyn; Xue, Yan; Yin, Xungang; Yu, Lisan; Zambrano, Eduardo; Zeyaeyan, Sadegh; Zhang, Huai Min; Zhang, Peiqun; Zhao, Guanguo; Lin, Zhao; Zhou, Xinjia; Zhu, Zhiwei; Ziemke, J. R.; Ziese, Markus; Andersen, Andrea; Griffin, Jessicca; Hammer, Gregory; Love-Brotak, S. Elizabeth; Misch, Deborah J.; Riddle, Deborah B.; Veasey, Sara W.

doi:10.1175/2019bamsstateoftheclimate.1

Cited by 191 publications

(101 citation statements)

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“…Note 3: Also used in many areas, including dendroclimatology 37 and health 38 . Note 4: Used to calculate scPDSI for monitoring drought 39 , and in areas including regional agronomic production 40 and river basin vegetation 41 . Note 5: minimum and maximum temperatures are the monthly means of the individual daily minimum and maximum temperatures; they are not the overall minimum or maximum temperature recorded in each month.…”

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confidence: 99%

Version 4 of the CRU TS monthly high-resolution gridded multivariate climate dataset

et al. 2020

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CRU TS (Climatic Research Unit gridded Time Series) is a widely used climate dataset on a 0.5° latitude by 0.5° longitude grid over all land domains of the world except Antarctica. It is derived by the interpolation of monthly climate anomalies from extensive networks of weather station observations. Here we describe the construction of a major new version, CRU TS v4. It is updated to span 1901-2018 by the inclusion of additional station observations, and it will be updated annually. The interpolation process has been changed to use angular-distance weighting (ADW), and the production of secondary variables has been revised to better suit this approach. This implementation of ADW provides improved traceability between each gridded value and the input observations, and allows more informative diagnostics that dataset users can utilise to assess how dataset quality might vary geographically.

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confidence: 99%

Version 4 of the CRU TS monthly high-resolution gridded multivariate climate dataset

et al. 2020

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“…In situ observations show that RH averaged over land decreased from 2000 but had not recovered as of 2018 (Byrne & O'Gorman, 2018;Willett et al, 2014;2018). The decline in land-averaged RH since 2000 is also observed in reanalysis data, where the decrease in RH is greater than that from in situ observations (Dunn et al, 2017;Willett et al, 2018). Although this observed decline of land-averaged RH since 2000 is not captured by some global climate models in the Coupled Model Intercomparison Project Phase 5 (CMIP5) archive (Dunn et al, 2017), the multimodel annual mean projects that surface RH will decrease over most land areas (except for parts of tropical Africa and South Asia) by the end this century, possibly due to the faster increase in surface air temperature over land than over the ocean (Byrne & O'Gorman, 2016;Kirtman et al, 2013).…”

Section: Introductionmentioning

confidence: 80%

The Evolving Distribution of Relative Humidity Conditional Upon Daily Maximum Temperature in a Warming Climate

2020

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The impacts of heat waves in a warming climate depend not only on changing temperatures but also on changing humidity. Using 35 simulations from the Community Earth System Model Large Ensemble (CESM LENS), we investigate the long-term evolution of the joint distribution of summer relative humidity (RH) and daily maximum temperature (Tmax) near four U.S. cities (New York City, Chicago, Phoenix, and New Orleans) under the high-emissions Representative Concentration Pathway (RCP) 8.5. We estimate the conditional quantiles of RH given Tmax with quantile regression models, using functions of temperature for each city in July for three time periods (1990-2005, 2026-2035, and 2071-2080). Quality-of-fit diagnostics indicate that these models accurately estimate conditional quantiles for each city. As expected, each quantile of Tmax increases from 1990-2005 to 2071-2080, while mean RH decreases modestly. Conditional upon a fixed quantile of Tmax, the median and high quantiles of RH decrease, while those of the Heat Index (HI) and dew point both increase. This result suggests that, despite a modest decrease in median relative humidity, heat stress measured by metrics considering both humidity and temperature in a warming climate will increase faster than that measured by temperatures alone would indicate. For a fixed Tmax, the high quantiles of RH (and thus of HI and dew point) increase from 1990-2005 to 2071-2080 in all four cities. This result suggests that the heat stress of a day at a given Tmax will increase in a warming climate due to the increase of RH. Although many studies have targeted heat waves and their impact on human health (

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“…Currently, Earth's surface temperatures have been rising by about 0.2 K per decade since 1981 [4] (considering deseasonalized monthly surface temperature anomalies from HadCRUTv4.5). Thus, climate change and global warming pose a severe threat to humanity.…”

Section: Earth's Energy Imbalancementioning

confidence: 99%

UVSQ-SAT, a Pathfinder CubeSat Mission for Observing Essential Climate Variables

et al. 2019

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The UltraViolet and infrared Sensors at high Quantum efficiency onboard a small SATellite (UVSQ-SAT) mission aims to demonstrate pioneering technologies for broadband measurement of the Earth’s radiation budget (ERB) and solar spectral irradiance (SSI) in the Herzberg continuum (200–242 nm) using high quantum efficiency ultraviolet and infrared sensors. This research and innovation mission has been initiated by the University of Versailles Saint-Quentin-en-Yvelines (UVSQ) with the support of the International Satellite Program in Research and Education (INSPIRE). The motivation of the UVSQ-SAT mission is to experiment miniaturized remote sensing sensors that could be used in the multi-point observation of Essential Climate Variables (ECV) by a small satellite constellation. UVSQ-SAT represents the first step in this ambitious satellite constellation project which is currently under development under the responsibility of the Laboratory Atmospheres, Environments, Space Observations (LATMOS), with the UVSQ-SAT CubeSat launch planned for 2020/2021. The UVSQ-SAT scientific payload consists of twelve miniaturized thermopile-based radiation sensors for monitoring incoming solar radiation and outgoing terrestrial radiation, four photodiodes that benefit from the intrinsic advantages of Ga 2 O 3 alloy-based sensors made by pulsed laser deposition for measuring solar UV spectral irradiance, and a new three-axis accelerometer/gyroscope/compass for satellite attitude estimation. We present here the scientific objectives of the UVSQ-SAT mission along the concepts and properties of the CubeSat platform and its payload. We also present the results of a numerical simulation study on the spatial reconstruction of the Earth’s radiation budget, on a geographical grid of 1 ° × 1 ° degree latitude-longitude, that could be achieved with UVSQ-SAT for different observation periods.

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State of the Climate in 2018

Abstract: Editor’s note: For easy download the posted pdf of the State of the Climate for 2019 is a low-resolution file. A high-resolution copy of the report is available by clicking here. Please be patient as it may take a few minutes for the high-resolution file to download.

Cited by 191 publications

References 1 publication

Version 4 of the CRU TS monthly high-resolution gridded multivariate climate dataset

Version 4 of the CRU TS monthly high-resolution gridded multivariate climate dataset

The Evolving Distribution of Relative Humidity Conditional Upon Daily Maximum Temperature in a Warming Climate

UVSQ-SAT, a Pathfinder CubeSat Mission for Observing Essential Climate Variables

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