Twentieth-century warming preserved in a Geladaindong mountain ice core, central Tibetan Plateau by Yulan Zhang, Shichang Kang, Bjorn Grigholm, Yongjun Zhang, Susan Kaspari, Uwe Morgenstern, Jiawen Ren, Dahe Qin, Paul A. Mayewski, Qianggong Zhang, Zhiyuan Cong, Mika Sillanpää, Margit Schwikowski, Feng Chen

“…Compared with other temperature records from the TP and the Northern Hemisphere, the Geladaindong ice-core record suggested that the regional climate of the central TP experienced a stronger warming trend during the 20th century than other regions. …”
Get full text

Exploring light use efficiency models capacities in characterizing environmental impacts on paddy rice productivity by Nuo Cheng, Yanlian Zhou, Wei He, Weimin Ju, Tingting Zhu, Yibo Liu, Ping Song, Wenjun Bi, Xiaoyu Zhang, Xiaonan Wei

“…In this study, at seven rice-growing sites over the Northern Hemisphere and based on six commonly used LUE models, we calibrated the parameters (i.e., maximum LUE (LUEmax) and optimum temperature) by separating the growing period into four phenological transitions and evaluated the performance of models, and investigated the impact of changes in cloud conditions and environmental factors (i.e., air temperature and vapor pressure deficit) on GPP simulations. …”
Get full text

The mixed phylogenetic origin of northern pike (Esox lucius Linnaeus 1758) populations in the Middle Danubian drainage by Péter Takács, Bálint Bánó, István Czeglédi, Tibor Erős, Árpád Ferincz, Blanka Gál, Bernadett Bánó-Kern, Balázs Kovács, András Attila Nagy, Krisztián Nyeste, Vera Lente, Bálint Preiszner, Sándor Sipos, Ádám Staszny, Zoltán Vitál, András Weiperth, Eszter Csoma

“…Abstract Background Pikes, members of genus Esox, are widespread freshwater predators of the northern hemisphere, and important sport fish also. From the Carpathian basin only one species, the northern pike (E. lucius) is noted. …”
Get full text

Atmospheric CH₄ and Its Isotopic Composition (δ¹³C) in Urban Environment in the Example of Moscow, Russia by Elena Berezina, Anastasia Vasileva, Konstantin Moiseenko, Natalia Pankratova, Andrey Skorokhod, Igor Belikov, Valery Belousov

“…Contributions of the upwind continental CH₄ and CO sources to the measured species levels were estimated through comparison with the Mace Head site data representative for the Northern Hemisphere baseline air. The study provides, for the first time, important insights into the long- and short-term variations of CH₄ levels in Moscow in connection to the local (urban) emissions and long-range transport from upwind continental sources. …”
Get full text

Scots Pines (<i>Pinus sylvestris</i>) as Sources of Biological Ice-Nucleating Macromolecules (INMs) by Teresa M. Seifried, Florian Reyzek, Paul Bieber, Hinrich Grothe

“…It grows in the largest forest system in the northern hemisphere and, together with birch trees, occupies a major part of the boreal forests. …”
Get full text

Modelling the growth of atmospheric nitrous oxide using a global hierarchical inversion by A. C. Stell, M. Bertolacci, A. Zammit-Mangion, M. Rigby, P. J. Fraser, C. M. Harth, P. B. Krummel, X. Lan, X. Lan, M. Manizza, J. Mühle, S. O'Doherty, R. G. Prinn, R. F. Weiss, D. Young, A. L. Ganesan

“…The prior emissions used in this and other previous work exhibit a seasonal cycle in the extra-tropical Northern Hemisphere that is out of phase with the posterior solution, and there is a substantial zonal redistribution of emissions from the prior to the posterior. …”
Get full text

Responses of compound daytime and nighttime warm-dry and warm-humid events to individual anthropogenic forcings by Felicia Chiang, Benjamin I Cook, Sonali McDermid, Kate Marvel, Gavin A Schmidt, Larissa S Nazarenko, Maxwell Kelley

“…In particular, aerosols produce a greater cooling effect on daytime relative to nighttime temperatures, which notably results in a historical reduction of Northern Hemisphere daytime warm-dry events relative to natural conditions. …”
Get full text

2019–2020 H1N1 clade A5a.1 viruses have better in vitro fitness compared with the co-circulating A5a.2 clade by Nicholas J. Swanson, Paula Marinho, Amanda Dziedzic, Anne Jedlicka, Hsuan Liu, Katherine Fenstermacher, Richard Rothman, Andrew Pekosz

“…While fitness and antigenic structure are both important aspects of virus success, they are distinct characteristics and do not always change in a complementary manner. The 2019–2020 Northern Hemisphere influenza season saw the emergence of two H1N1 clades: A5a.1 and A5a.2. …”
Get full text

Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks by M. Willeit, R. Calov, S. Talento, R. Greve, R. Greve, J. Bernales, V. Klemann, M. Bagge, M. Bagge, A. Ganopolski

“…</p> <p>CLIMBER-X simulates a rapid increase in Northern Hemisphere ice sheet area through MIS5d, with ice sheets expanding over northern North America and Scandinavia, in broad agreement with proxy reconstructions. …”
Get full text

Evidence for multi-decadal fuel buildup in a large California wildfire from smoke radiocarbon measurements by A Odwuor, C C Yañez, Y Chen, F M Hopkins, A Moreno, X Xu, C I Czimczik, J T Randerson

“…Using a Keeling plot approach, we determined that the mean Δ ^14 C of PM _2.5 was 111.6 ± 7.7‰ ( n = 12), which was considerably enriched relative to atmospheric carbon dioxide in the northern hemisphere in 2021 (−3.2 ± 1.4‰). Combining these Δ ^14 C data with a steady-state one-box ecosystem model, we estimated that the mean age of fuels combusted in the KNP Complex Fire was 40 years, with a range of 29–57 years. …”
Get full text

FUKUSHIMA FALLOUT IN SAKHALIN REGION, RUSSIA, PART 1: 137CS AND 134CS IN GRASSLAND SOILS by V. P. Ramzaev, A. N. Barkovsky, A. V. Gromov, S. A. Ivanov, М. V. Kaduka

“…The  caesium-134  and  caesium-137  radionuclides released into the atmosphere as a  result of the Fukushima accident were dispersed over the entire Northern Hemisphere. To assess the risks associated with the exposure due to Fukushima fallout, a comprehensive radiological survey was performed in the Russian Far East. …”
Get full text

Phylogeography of Populus koreana reveals an unexpected glacial refugium in Northeast Asia by Ji Wang, Hongying Zhang, Markus Ruhsam, Xiaoyan Fan, Xue Li, Jae Min Chung, Mi Yoon Chung, Myong Gi Chung, Shiyang Wang, Jing Wang, Kangshan Mao

“…The genetic structure of temperate plants in the northern hemisphere was significantly influenced by the Quaternary climate oscillations. …”
Get full text

Siberian 2020 heatwave increased spring CO2 uptake but not annual CO2 uptake by Min Jung Kwon, Ashley Ballantyne, Philippe Ciais, Ana Bastos, Frédéric Chevallier, Zhihua Liu, Julia K Green, Chunjing Qiu, John S Kimball

“…Using bottom–up and top–down approaches, we evaluated seasonal and annual CO _2 fluxes of 2020 in the northern hemisphere (north of 30 °N), focusing on Siberia where the pronounced heatwave occurred. …”
Get full text

Global investigation of the Mg atom and ion layers using SCIAMACHY/Envisat observations between 70 and 150 km altitude and WACCM-Mg model results by M. P. Langowski, C. von Savigny, J. P. Burrows, W. Feng, J. M. C. Plane, D. R. Marsh, D. Janches, M. Sinnhuber, A. C. Aikin, P. Liebing

“…For higher latitudes the density is lower and only in the Northern Hemisphere a seasonal cycle with a summer minimum is observed. …”
Get full text

Genetic characterization of influenza A(H1N1)pdm09 virus in 2023 in Huzhou, China by Deshun Xu, Liping Chen, Lei Ji, Wei Yan

“…Results: The 25 (H1N1)pdm09 strains and representative 2023–2024 northern hemisphere vaccine strain A/Wisconsin/67/2022 showed nucleotide and amino acid similarity of 98.41 %–99.22 % and 98.41 %–99.36 %, respectively. …”
Get full text

On the state dependency of the equilibrium climate sensitivity during the last 5 million years by P. Köhler, B. de Boer, A. S. von der Heydt, L. B. Stap, R. S. W. van de Wal

“…We thus find support for a previously proposed state change in the climate system with the widespread appearance of northern hemispheric ice sheets. This study points for the first time to a so far overlooked non-linearity in the land ice albedo radiative forcing, which is important for similar palaeodata-based approaches to calculate climate sensitivity. …”
Get full text

Synthesis of habitat models for management of wolverine (Gulo gulo): Identifying key habitat and snow refugia in the Columbia and Rocky Mountains, Canada by Gabriel Schepens, Karine Pigeon, Anne Loosen, Anne Forshner, Aerin L. Jacob

“…The wolverine is a wide-ranging and frequently at-risk or data-deficient species with dramatic range contractions across the northern hemisphere. Recent reports of low population densities inside and outside protected areas in western North America highlight the need for better conservation practice, policy, and planning across large landscapes. …”
Get full text

The history of Lyme disease in Italy and its spread in the Italian territory by Giusto Trevisan, Maurizio Ruscio, Marina Cinco, Katiuscia Nan, Patrizia Forgione, Nicola Di Meo, Nicola Di Meo, Paolo Tranchini, Massimo Nacca, Silvana Trincone, Sara Giordana Rimoldi, Vania Giacomet, Michela Ricci, Davide Melandri, Stefania Artioli, Patrizia Monteforte, Giuseppe Stinco, Serena Bonin

“…Lyme borreliosis (LB) is the most common vector-borne zoonotic inflammatory disease in the Northern Hemisphere. In Italy, the first case was diagnosed in 1985 in a woman in Liguria, while the second, in 1986 in Friuli-Venezia Giulia, documenting the infection in northern Italy. …”
Get full text

Seasonal aridity in the Indo-Pacific Warm Pool during the Late Glacial driven by El Niño-like conditions by P. L. Hällberg, F. Schenk, F. Schenk, K. A. Yamoah, X. Kuang, R. H. Smittenberg

“…We identify that the simulated drying and enhanced seasonality in the Late Glacial is mainly the result of a combination of three factors: (1) large orbital insolation difference on the Northern Hemisphere (NH) between summer and winter, in contrast to the LGM and the present day, (2) a stronger (dry) East Asian winter monsoon caused by a larger meridional thermal gradient and (3) a major reorganization of the Indo-Pacific Walker Circulation with an inverted land-sea circulation and a complete breakdown of deep convection over ISEA in NH winters. …”
Get full text

Early Holocene ice on the Begguya plateau (Mt. Hunter, Alaska) revealed by ice core ¹⁴C age constraints by L. Fang, L. Fang, T. M. Jenk, T. M. Jenk, D. Winski, K. Kreutz, H. L. Brooks, E. Erwin, E. Osterberg, S. Campbell, C. Wake, M. Schwikowski, M. Schwikowski, M. Schwikowski

“…Our results suggest this may be related to an increase in annual net snow accumulation rates over this period following the Northern Hemisphere Holocene Climate Optimum (around 8 to 5 kyr BP). …”
Get full text