Results 21 to 30 of about 1,051,099 (291)

Mid- and long-chain leaf waxes and their δ2H signatures in modern plants and lake sediments from mid-latitude North America

, 2022
Compound-specific δ2H composition of leaf-wax n-alkanes are increasingly being used to infer past hydroclimates. Mid- and long-chain n-alkanes in sedimentary archives (i.e., C23 and C29) are thought to derive from aquatic and terrestrial plants ...
David G. Williams (12120063), Ioana C. Stefanescu (12909399), Chandelle Macdonald (12909400), Bryan N. Shuman (12909405), Craig S. Cook (12909402)   +4 more
core   +1 more source

Summer Russian heat waves and their links to Greenland’s ice melt and sea surface temperature anomalies over the North Atlantic and the Barents–Kara Seas

Environmental Research Letters, 2020
In this paper, we examine what leads to the onset of summer Russian heat waves. The reanalysis data show that summer heat waves over west Russia have two types of spatial patterns: mid-latitude heat waves related to mid-latitude Ural blocking Ural ...
Hejing Wang, Dehai Luo
doaj   +1 more source

On the Properties of and Ionospheric Conditions Associated With a Mid‐Latitude Scintillation Event Observed Over Southern United States

Space Weather, 2021
While low and high‐latitude ionospheric scintillation have been extensively reported, significantly less information is available about the properties of and conditions leading to mid‐latitude scintillations.
F. S. Rodrigues, J. G. Socola, A. O. Moraes, C. Martinis, D. A. Hickey   +4 more
doaj   +1 more source

The dayside high-latitude trough under quiet geomagnetic conditions: Radio tomography and the CTIP model [PDF]

, 2005
International audienceThe dayside high-latitude trough is a persistent feature of the post-noon wintertime auroral ionosphere. Radio tomography observations have been used to map its location and latitudinal structure under quiet geomagnetic conditions ...
Dewis, K. L., Denton, M.H., Pryse, S. E., Balthazor, R. L., Middleton, H. R., Balthazor, R.L., H. R. Middleton, Dewis, K.L., R. L. Balthazor, Denton, M. H., S. E. Pryse, Pryse, S.E., Middleton, H.R., K. L. Dewis, M. H. Denton   +14 more
core   +2 more sources

Assessment of the Algorithm for Single Frequency Precise Point Positioning at Different Latitudes and with Distinct Magnetic Storm Conditions

Applied Sciences, 2020
This paper analyzes the convergence time and the root mean square (RMS) error of single frequency (SF) precise point positioning (PPP) in the ionospheric-constrained (TIC1) and troposphere- and ionospheric-constrained (TIC2) conditions, when the stations
Ren Wang, Jingxiang Gao, Yifei Yao, Peng Sun, Moufeng Wan   +4 more
doaj   +1 more source

Observation of Terrestrial Gamma‐Ray Flashes at Mid Latitude [PDF]

Journal of Geophysical Research: Atmospheres, 2021
AbstractWe present a sample of Terrestrial Gamma‐ray Flashes (TGFs) observed at mid latitudes by the Atmosphere Space Interaction Monitor (ASIM). The events were detected between June 2018 and August 2020 in the latitude bands between 35° and 51° in both hemispheres, which we hereafter refer to as “mid latitudes.” The sample includes the first ...
Maiorana, C., Marisaldi, M., Füllekrug, M., Soula, S., Lapierre, J., Mezentsev, A., Skeie, C., Heumesser, M., Chanrion, O., Østgaard, N., Neubert, T., Reglero, V.   +11 more
openaire   +4 more sources

Robust but weak winter atmospheric circulation response to future Arctic sea ice loss

Nature Communications, 2022
The degree to which Arctic sea ice decline influences the mid-latitude atmospheric circulation is widely debated. Here, the authors use a coordinated multi-model experiment to show that Arctic sea ice loss causes a weakening of the mid-latitude westerly ...
D. M. Smith, R. Eade, M. B. Andrews, H. Ayres, A. Clark, S. Chripko, C. Deser, N. J. Dunstone, J. García-Serrano, G. Gastineau, L. S. Graff, S. C. Hardiman, B. He, L. Hermanson, T. Jung, J. Knight, X. Levine, G. Magnusdottir, E. Manzini, D. Matei, M. Mori, R. Msadek, P. Ortega, Y. Peings, A. A. Scaife, J. A. Screen, M. Seabrook, T. Semmler, M. Sigmond, J. Streffing, L. Sun, A. Walsh   +31 more
doaj   +1 more source

Probabilistic Forecasting of Ground Magnetic Perturbation Spikes at Mid‐Latitude Stations

Space Weather, 2023
The prediction of large fluctuations in the ground magnetic field (dB/dt) is essential for preventing damage from Geomagnetically Induced Currents. Directly forecasting these fluctuations has proven difficult, but accurately determining the risk of ...
Michael Coughlan, Amy Keesee, Victor Pinto, Raman Mukundan, José Paulo Marchezi, Jeremiah Johnson, Hyunju Connor, Don Hampton   +7 more
doaj   +1 more source

Spectral and photometric characteristics of mid-latitude auroras during the magnetic storm of March 17, 2015

Solar-Terrestrial Physics, 2018
We study the spatiotemporal dynamics of mid-latitude aurora from observations in the south of Eastern Siberia during St. Patrick’s severe geomagnetic storm on March 17, 2015. We perform a morphological analysis of characteristics of the observed auroras.
Mikhalev A.V., Beletsky A.B., Vasilyev R.V., Zherebtsov G.A., Podlesny S.V., Tashchilin M.A., Artamonov M.F.   +6 more
doaj   +1 more source

The influence of Arctic amplification on mid-latitude summer circulation. [PDF]

Nat Commun, 2018
Accelerated warming in the Arctic, as compared to the rest of the globe, might have profound impacts on mid-latitude weather. Most studies analyzing Arctic links to mid-latitude weather focused on winter, yet recent summers have seen strong reductions in
Coumou D, Di Capua G, Vavrus S, Wang L, Wang S.   +4 more
europepmc   +2 more sources