Static and Dynamic Model Calibration for Upper Thermosphere Determination by Haibing Ruan, Jiuhou Lei, Jianyong Lu

“…The model residuals are compiled into longitude and latitude bins, and the corresponding basic modes of describing variabilities are subsequently derived via the PCA method. …”
Get full text

Investigation of the Relation between South and Southwest Iran\'s Heavy Rainfall with Atmospheric Rivers (ARs). by Nesa sepandar, kamal omidvar

“…For this purpose, daily rainfall of 17 synoptic stations in the period 1986 to 2015 in south and southwestern Iran that have a common time span and fully cover the study area is used.Also from the data set of the National Center for Environmental Prediction / National Center for Atmospheric Research (NCEP / NCAR) European Mid-Term Forecast Center (ECMWF) and ERA-interim data with spatial resolution of 0.75 It was used at 0.75 latitude and longitude with 6 hour resolution. The variables used are integrated water vapor (IWV), specific humidity (q), and orbital and meridional components (u, v). …”
Get full text

GNSS Differential Code Bias Determination Using Rao‐Blackwellized Particle Filtering by Ben Reid, David R. Themens, Anthony McCaffrey, P. T. Jayachandran, Mainul Hoque, Andrew J. Mazzella Jr.

“…Abstract The Assimilative Canadian High Arctic Ionospheric Model (A‐CHAIM) is a near‐real‐time data assimilation model of the high latitude ionosphere, incorporating measurements from many instruments, including slant Total Electron Content measurements from ground‐based Global Navigation Satellite System (GNSS) receivers. …”
Get full text

Analysis of heating degree day requirments changes under climate change in South Khorasan by hossein Imani pour, abdolreza Kashki, mokhtar Karami

“…By examining the effect of geographic features (latitude and longitude and station height) on the heating needs in the area, it was determined that the role of heights is very effective in changing the heating needs. …”
Get full text

Regulatory mechanisms for underground waste disposal in Nigeria: review and implications for environmental management by Irwin Anthony Akpoborie

“…The review shows that in general, the design and materials specifications for injection wells, monitoring wells and landfills lack precision and as a result allow too much latitude in interpretation. Furthermore, the laws place inordinate reliance on waste facility owners to ascertain crucial parameters for example, well casing integrity and in the case of landfills, liner integrity which regulators do not have the capacity or resources to verify. …”
Get full text

Nitrogen Deposition to and Cycling in a Deciduous Forest by Sara C. Pryor, Rebecca J. Barthelmie, Margaret Carreiro, Melissa L. Davis, Anne Hartley, Bjame Jensen, Andrew Oliphant, Melissa J. C. Randolph, Justin T. Schoof

“…The project described here seeks to answer questions regarding the role increased nitrogen (N) deposition is playing in enhanced carbon (C) sequestration in temperate mid-latitude forests, using detailed measurements from an AmeriFlux tower in southern Indiana (Morgan-Monroe State Forest, or MMSF). …”
Get full text

Attributing the effects of climate change and forest disturbance on runoff using distributed modeling and indicators of hydrological alteration in Central European montane basins by Jakub Langhammer, Jana Bernsteinová

“…Study region: Eight unregulated basins in the headwaters of five mid-latitude mountain ranges in Central Europe, including the Šumava Mts. …”
Get full text

Variability in Dust Observed over China Using A-Train CALIOP Instrument by Hui Xu, Fengjie Zheng, Wenhao Zhang

“…The correlation coefficients between the latitude averaged column integrated dust aerosol feature optical depth (C-DAFOD) and precipitation, soil moisture, and vegetation coverage are −0.65, −0.81, and −0.77, respectively. …”
Get full text

Case Studies on the Day‐to‐Day Variability in the Occurrence of Post‐Sunset Equatorial Spread F by B. Olugbon, E. O. Oyeyemi, A. Kashcheyev

“…This study presents the results of the occurrence of post‐sunset ESF using data obtained from the Lowell Digisonde at Ilorin, Nigeria (ILR; 4.68°E, 8.50°N; Dip latitude −1.25°), spanning May–September 2019. In this interval, data was available on 124 days and, of this number, post‐sunset ESF occurred on 99 days (79.8%). …”
Get full text

Dynamics of Electron Flux in the Slot Region and Geomagnetic Activity by L. Nikitina, L. Trichtchenko

“…To evaluate geomagnetic conditions, associated with enhancement of electron flux, all the “slot filling events” were studied together with geomagnetic activity provided by Dst and Kp global indices as well as with the hourly range indices of geomagnetic variations at mid‐latitude. These geomagnetic indices were used for assessment of a threshold and frequency of occurrence of slot filling events. …”
Get full text

Capacity Density Assessment of Satellite Constellation Network by Xian MENG, Dali QIN, Yu WANG, Chuili KONG, Hejia LUO, Jun WANG

“…The traditional analytical method greatly underestimates the throughput capability of the system in low beam density scenario, and cannot reveal the capacity saturation phenomenon in high beam density scenario.To overcome the preceding problems, a new system simulation method was proposed to accurately evaluated the capacity density indicator of satellite constellation network and integrated satellite and terrestrial network, Based on this method, first, the capacity density of different longitude and latitude regions of the earth was evaluated.It could be observed that the capacity density of the same region varies greatly with the movement of the satellite, and the maximum capacity density was twice the minimum.Then, areas with higher visibility usually had higher capacity density.In high-frequency scenarios, the impact of atmospheric attenuation on capacity density could not be ignored.Finally, for the integrated satellite and terrestrial network, the evaluation results showed that the capacity density of cellular coverage and satellite coverage could differ by four orders of magnitude.In order to improved the capacity density of satellite constellation network, two technical paths were attempted: increasing the maximum number of illuminated beams and increasing the satellite scale.The results showed that the performance was better when the constellation scale was increased when the total beams of the constellation were the same.However, the two ways to increase the total number of beams in a constellation had an upper bound on capacity, and the marginal effect decreased significantly.Finally, a scheme to increase the gain of satellite antenna was proposed.The simulation results showed that the proposed scheme could significantly increase the capacity density of constellation.…”
Get full text

Single‐step geolocation for a non‐circular source in the presence of satellite orbit perturbations by Jiexin Yin, Ding Wang, Fuquan Nie, Nae Zheng

“…It exploits the non‐circular property of signals and a priori information of satellite orbit error distribution to jointly calibrate orbit errors and determine the longitude and latitude of the transmitter based on the ellipsoidal Earth model, which integrates an alternating iteration scheme for the estimation of various unknowns instead of the exhaustive grid search. …”
Get full text

Increasing the Efficiency Factor of Solar Power Plants Due to Solar Energy Localizing by V. I. Mironchuk, A. A. Velchenko

“…An algorithm for increasing the efficiency factor of  solar power plants by localizing the solar trajectory depending on the latitude and longitude of the area has been proposed. …”
Get full text

Regulatory mechanisms for underground waste disposal in Nigeria: review and implications for environmental management by Irwin Anthony Akpoborie

“…The review shows that in general, the design and materials specifications for injection wells, monitoring wells and landfills lack precision and as a result allow too much latitude in interpretation. Furthermore, the laws place inordinate reliance on waste facility owners to ascertain crucial parameters for example, well casing integrity and in the case of landfills, liner integrity which regulators do not have the capacity or resources to verify. …”
Get full text

Several Geological Issues of Schrödinger Basin Exposed by CE-2 CELMS Data by Z. G. Meng, H. H. Wang, Y. C. Zheng, Y. Z. Wang, H. Miyamoto, Z. C. Cai, J. S. Ping, Y. Z. Zhu

“…Also, the study proves the applicability of the CELMS data applying in high latitude regions to a certain extent.…”
Get full text

Partially Erupted Prominence Material as a Diagnostic of Coronal Mass Ejection Trajectory by B. A. Hovis‐Afflerbach, B. J. Thompson, E. I. Mason

“…Using a method called persistence mapping, 304 Å images from the Solar Dynamics Observatory (SDO), and coronagraph images from the Solar and Heliospheric Observatory, we measure and compare the offsets in latitude of 20 CMEs and their respective prominences with respect to the source region. …”
Get full text

Migratory behaviour of humpback whales in the southeastern Pacific under climate change by Virginie Millien, Nicole Stafiej, Fernando Félix, Hector M. Guzman

“…Abstract Humpback whales, a species of baleen whale occurring in all oceans globally, undergo seasonal migration between their breeding grounds in tropical warm waters and high latitude feeding grounds. Using multiple years of satellite tracking data, we modeled the effect of oceanic conditions on the movement behaviour of 42 humpback whales belonging to the Southeastern Pacific population (also known as Breeding Stock G) during their migration from breeding grounds in Costa Rica, Panama and Ecuador to feeding grounds in waters around the Antarctic Peninsula. …”
Get full text

Simulation Experiment Study on Impacting the δD Value of Aromatic Compounds by Yi Duan, Yingzhong Wu, Lantian Xing, Yingqin Wu, Yang Zhao, Zhongping Li, Lanhua Ma

“…Our simulation experiments showed that the δD value of pyrolytic polycyclic aromatic hydrocarbons (PAHs) was significantly different between the studied samples from high and low latitude regions. Comparative studies showed that the δD values of PAHs produced by pyrolysis were related to those of water in the two regions. …”
Get full text

REE Geochemistry of Euphrates River, Turkey by Leyla Kalender, Gamze Aytimur

“…The study area is located on the Euphrates River at 38°41°32.48′′N–38°14′24.10′′N latitude and 39°56′4.59′′E–39°8°13.41′′E longitude. …”
Get full text

Global and regional perspectives on optimizing thermo-responsive dynamic windows for energy-efficient buildings by Yuan Gao, Jacob C. Jonsson, D. Charlie Curcija, Simon Vidanovic, Tianzhen Hong

“…World heatmap results, derived from well-trained artificial neural network models, reveal that thermo-responsive windows are especially useful in climates where buildings demand both heating and cooling energy, whereas thermo-responsive windows with optimal transition temperatures show no dynamic features in most of low-latitude tropical regions. Additionally, this study provides a practical guideline and an open-source mapping tool to optimize the intrinsic properties of thermo-responsive materials and evaluate their energy performance for sustainable buildings at various geographical scales.…”
Get full text