Article
Multidisciplinary Sciences
Kara J. Pitman, Jonathan W. Moore, Matthias Huss, Matthew R. Sloat, Diane C. Whited, Tim J. Beechie, Rich Brenner, Eran W. Hood, Alexander M. Milner, George R. Pess, Gordan H. Reeves, Daniel E. Schindler
Summary: Glacier retreat creates new habitat for Pacific salmon, but the potential gains in future salmon habitat associated with glacier loss have yet to be quantified.
NATURE COMMUNICATIONS
(2021)
Article
Environmental Sciences
Xi Cao, Renguang Wu, Ying Sun, Zhibiao Wang, Yifeng Dai, Lei Song, Xiaoqing Lan, Xiping Zhang
Summary: This study reveals a connection between North America spring snow cover and summer-fall tropical cyclone genesis over the western North Pacific, mediated by sea surface temperature anomalies in the tropical and subtropical Pacific. The increased snow cover leads to atmospheric cooling and changes in wind patterns, affecting the occurrence of tropical cyclones. Understanding these complex interactions is crucial for climate research.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Valentina Espinoza, Giampiero Iaffaldano
Summary: This work proposes an alternative method for studying the changes in absolute plate motion based on high-resolution relative plate motion data sets. By studying time periods with a high probability of plate motion change across multiple spreading ridges, the authors were able to identify and quantify the changes in absolute plate motion for South America and neighboring plates Nubia, Antarctica, Somalia, North America, and Pacific. The study found that kinematic changes occurred between 9 and 5 Ma for all plates, and an additional change occurred between 14 and 10 Ma for South America. The torque variations required for these kinematic changes were estimated to be between 5×10^23 and 2×10^24 N·m.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
A. Boyce, M. V. Liddell, S. Pugh, J. Brown, E. McMurchie, A. Parsons, C. Esteve, S. Burdick, F. A. Darbyshire, S. Cottaar, I. D. Bastow, A. J. Schaeffer, P. Audet, D. L. Schutt, R. C. Aster
Summary: Our knowledge of the Canadian and Alaskan mantle's current state and evolution is limited by a lack of absolute P-wavespeed constraints. This hinders our understanding of cratonic modification, orogenic history, and complexities within the Alaskan Proto-Pacific subduction system. To address this, we used the Absolute Arrival-time Recovery Method (AARM) to extract over 180,000 new absolute arrival-time residuals from seismograph stations across Canada and Alaska. We developed a new absolute P-wavespeed tomographic model, CAP22, which significantly improves resolution in both Canada and Alaska.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
Riccardo Asti, Nicolas Saspiturry, Paul Angrand
Summary: Plate kinematic reconstructions suggest that the Iberian plate underwent significant eastward drift and counterclockwise rotation with respect to Eurasia during the Late Jurassic-Early Cretaceous period. While previous studies proposed that this displacement was accommodated along the North Pyrenean Zone, there is no substantial field evidence for such a large horizontal displacement along the North Pyrenean Fault. This study proposes a revised understanding of the processes responsible for the plate boundary compartmentalization, suggesting that the left-lateral movement within the plate boundary was not localized along a single fault, but rather distributed through a zone of deformation that was recorded by sedimentary basins. The study also suggests that other Permian-Mesozoic depocenters located below the Cenozoic foreland basins may have played a role in this rift system.
EARTH-SCIENCE REVIEWS
(2022)
Article
Environmental Sciences
Ruping Mo, Hai Lin, Frederic Vitart
Summary: Based on analyses of observation-based data and numerical weather prediction model output, this study reveals that a warm-season atmospheric river moved from Southeast Asia across the North Pacific in June 2021, contributing heat and moisture to a heatwave event in western North America. The movement of this system resulted in substantial spillover of moisture and sensible heat, forming a positive feedback mechanism that potentially led to the expansion of the heatwave event.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Daniel R. Muhs
Summary: This passage mainly introduces the records of MIS 5e coastal terraces and coral reef terraces along the Pacific coast of North America, as well as the results of related chronostratigraphic studies. The shoreline angle is the primary indicator of paleo-sea level during MIS 5e, and chronology is determined mainly through uranium-series ages and amino acid ratios. The passage also mentions that sea surface temperatures were higher during MIS 5e compared to present, and there was no wholesale shift in faunal provinces. The tectonic activity in the region and the glacial isostatic adjustment processes contributed to the high sea stands during MIS 5e. Additionally, it introduces the records of earlier interglacial periods and the cooling trend during MIS 5a.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Meteorology & Atmospheric Sciences
Chengge Hu, Fange Yue, Haicong Zhan, Kenneth M. Y. Leung, Runqi Zhang, Weihua Gu, Hongwei Liu, Afeng Chen, Yue Cao, Xinming Wang, Zhouqing Xie
Summary: This study investigated n-alkanes and fatty acids in summer aerosol samples collected from the Bering Sea to the western North Pacific in 2014, 2016, and 2018. The results showed that lipid concentrations were highest in 2018, with the western North Pacific influenced by neighboring Eurasia and the Bering Sea influenced by aerosol transport from the western North Pacific and increased primary productivity. The study provides valuable information for understanding the sources and influencing factors of organic aerosols.
ATMOSPHERIC RESEARCH
(2023)
Article
Environmental Sciences
Anran Zhuge, Benkui Tan
Summary: The ZNPO pattern is a newly identified teleconnection pattern that oscillates mass in the troposphere between the eastern and western North Pacific, affecting severe weather and hydroclimate events in North Pacific and North America during winter. It is primarily driven by baroclinic energy conversion and feedback forcing by transient eddies, acting as a major source of kinetic energy to maintain the pattern.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Chengge Hu, Fange Yue, Haicong Zhan, Kenneth M. Y. Leung, Hongwei Liu, Weihua Gu, Runqi Zhang, Afeng Chen, Xinming Wang, Zhouqing Xie
Summary: In order to understand the formation process of biogenic and anthropogenic secondary organic aerosols (BSOA and ASOA) in the marine atmosphere under global warming, aerosol samples were collected from the Bering Sea to the western North Pacific over three summers. The results showed that concentrations of isoprene-derived SOA (SOAI) tracers were lowest in 2014, while concentrations of monoterpenes-derived SOA (SOAM) tracers were highest and the aerosols were more aged in that year. Spatially, SOA tracer concentrations were higher over the western North Pacific, mainly coming from terrestrial inputs. The study reveals significant contributions of terrestrial sources to different types of SOA over the western North Pacific.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Dillon Elsbury, Amy H. Butler, John R. Albers, Melissa L. Breeden, Andrew O'Neil Langford
Summary: Stratosphere-to-troposphere transport (STT) is a significant source of ozone for the troposphere, particularly in western North America. The variability and location of the Pacific jet stream and the amount of ozone in the lower stratosphere are important factors controlling STT in this region, which may change with increasing greenhouse gas concentrations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Melissa L. Breeden, Amy H. Butler, John R. Albers, Michael Sprenger, Andrew O'Neil Langford
Summary: This study demonstrates that the transition of the North Pacific jet from winter to summer enhances STT-PBL, resulting in more frequent deep stratospheric intrusions, especially over western North America. La Nina conditions in late winter lead to an earlier jet transition and enhanced STT-PBL, while an opposite response is found during El Nino conditions. These findings suggest that knowledge of ENSO state and the North Pacific jet structure in late winter could help predict the strength of STT-PBL in the following months.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Limnology
Kailin Liu, Jun Nishioka, Bingzhang Chen, Koji Suzuki, Shunyan Cheung, Yanhong Lu, Huijun Wu, Hongbin Liu
Summary: This study investigates phytoplankton growth and microzooplankton grazing, two critical processes in marine food webs, in the subarctic western Pacific and the Bering Sea. Results show that phytoplankton growth is primarily determined by nutrient availability and temperature. In the high-nutrient, low-chlorophyll regions, iron availability is the limiting factor. In the Gulf of Anadyr and Kamchatka Strait, phytoplankton growth is mainly limited by inorganic nitrogen. Microzooplankton grazing rate is influenced by temperature and prey availability. The study reveals different food web structures in areas with and without riverine iron input.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Geology
V Elongo, H. Falck, K. L. Rasmussen, L. J. Robbins, R. A. Creaser, Y. Luo, D. G. Pearson, C. Sarkar, E. Adlakha, M. C. Palmer, J. M. Scott, K. Hickey, K. Konhauser, P. Lecumberri-Sanchez
Summary: The highly irregular and localized distribution of tungsten deposits worldwide poses a supply challenge for key industries. This study investigates the factors controlling tungsten distribution and finds that tungsten is specifically associated with crustal materials derived from the mantle during specific geological periods. Weathering and erosion processes of supercontinents favored the pre-enrichment of tungsten in sediments, and orogenic heating produced reduced melts that efficiently scavenged tungsten and formed the largest deposits in North America.
Article
Meteorology & Atmospheric Sciences
Jonathan D. Beverley, Matthew Collins, F. Hugo Lambert, Robin Chadwick
Summary: Research suggests that future changes to the positive-phase ENSO teleconnection to the North Pacific/North America sector will weaken, largely due to anomalous circulation changes over the North Pacific. The study also indicates that changes in forcing from equatorial central Pacific precipitation anomalies are more significant than changes in the global basic state background circulation.
JOURNAL OF CLIMATE
(2021)
Article
Geochemistry & Geophysics
Emily S. Finzel, Eva Enkelmann, Sarah Falkowski, Tyler Hedeen
Article
Geochemistry & Geophysics
E. S. Finzel, K. D. Ridgway
Article
Geochemistry & Geophysics
Emily S. Finzel, Eva Enkelmann
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2017)
Article
Geosciences, Multidisciplinary
J. K. Kissock, E. S. Finzel, D. H. Malone, J. P. Craddock
Article
Geochemistry & Geophysics
E. S. Finzel
Article
Geosciences, Multidisciplinary
Eva Enkelmann, Sonia K. Sanchez Lohff, Emily S. Finzel
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2019)
Article
Geosciences, Multidisciplinary
Eva Enkelmann, Emily Finzel, Jeanette Arkle
Article
Geosciences, Multidisciplinary
Emily S. Finzel
FRONTIERS IN EARTH SCIENCE
(2019)
Article
Geochemistry & Geophysics
K. L. Garber, E. S. Finzel, D. M. Pearson
Article
Geosciences, Multidisciplinary
William A. Thomas, George E. Gehrele, Kurt E. Sundell, Stephen F. Greb, Emily S. Finzer, Ryan J. Clark, David H. Malone, Brian A. Hampton, Mariah C. Romero
Article
Geosciences, Multidisciplinary
E. Schwarz, E. S. Finzel, G. D. Veiga, C. W. Rapela, C. Echevarria, L. A. Spalletti
Summary: This study provides detailed detrital-zircon U-Pb geochronology of the Valanginian-Hauterivian Pilmatue Member of the Agrio Formation in the Neuquen Basin, along with sedimentology and paleogeographic reconstructions, to understand the role and pathway of far-flung sediment in the transportation system.
Article
Geochemistry & Geophysics
Justin A. Rosenblume, Emily S. Finzel, David M. Pearson
Summary: The Lower Cretaceous Kootenai Formation in western Montana showed three discrete provenance signatures, indicating different sediment sources from adjacent regions in Early Cretaceous time. These findings provide insights into the sediment dispersal patterns and translational history of terranes in the hinterland of the orogen during this period.
Article
Geosciences, Multidisciplinary
Justin A. Rosenblume, Emily S. Finzel, David M. Pearson, Cole T. Gardner
Summary: This study examines the provenance of the Lower Cretaceous Blackleaf Formation in southwestern Montana, revealing three distinct provenance groups and suggesting their sedimentation was influenced by the Western Interior Seaway.
Article
Geochemistry & Geophysics
E. S. Finzel, J. A. Rosenblume, D. M. Pearson, Pierre A. Zippi
Summary: The provenance and depositional age of the Upper Cretaceous Frontier Formation in southwestern Montana were determined using biostratigraphy, sandstone petrography, and detrital zircon geochronology. The results suggest that Laramide-style tectonism in Idaho-Montana may not be related to shallow-angle subduction, but rather controlled by factors such as inherited faults, basement highs, and sedimentary cover thickness.
Article
Geology
Emily S. Finzel, Justin A. Rosenblume
Summary: This study presents U-Pb geochronology of detrital zircons from lacustrine carbonate strata in southwestern Montana, USA, providing evidence for the effectiveness of acid-digestion recovery and resolving depositional ages of nonmarine strata. The results indicate that detrital zircon U-Pb geochronology holds considerable potential for dating critical chemical and climatic events recorded in the stratigraphy of lacustrine carbonates.
