i
Investigation of Solar Proton Access Into the Inner Magnetosphere on 11 September 2017
-
2019
Source: Journal of Geophysical Research: Space Physics,
Details:
-
Journal Title:Journal of Geophysical Research: Space Physics
-
Personal Author:
-
NOAA Program & Office:
-
Description:In this study, access of solar energetic protons to the inner magnetosphere on 11 September 2017 is investigated by computing the reverse particle trajectories with the Dartmouth geomagnetic cutoff code (Kress et al., 2010). The maximum and minimum cutoff rigidity at each point along the orbit of Van Allen Probe A is numerically computed by extending the code to calculate cutoff rigidity for particles coming from arbitrary direction. Pulse height analyzed (PHA) data have the advantage of providing individual particle energies and effectively excluding background high-energy proton contamination. This technique is adopted to study the cutoff locations for solar protons with different energy. The results demonstrate that cutoff latitude is lower for solar protons with higher energy, consistent with low-altitude vertical cutoffs. Both the observations and numerical results show that proton access into the inner magnetosphere depends strongly on angle between particle arrival direction and magnetic west. The numerical result is approximately consistent with the observation that the energy of almost all solar protons stays above the minimum cutoff rigidity.
-
Keywords:
-
Source:Journal of Geophysical Research: Space Physics, ; 124, 3402-3409 ;
-
Document Type:
-
Rights Information:Other
-
Compliance:Submitted
-
Main Document Checksum:urn:sha256:6e92ec6d25b8d42be9ca5021ec227b78fb9f6eceb42b6ae2b78ad50db4f6845d
-
File Type:
Supporting Files
-
No Additional Files
More +
Related Documents
-
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
- File Format:
- RIS
Probabilistic Forecasting of Snowfall Amounts Using a Hybrid between a Parametric and an Analog ApproachCitePersonal Author:Scheuerer, Michael ;Hamill, Thomas M.2019 | Mon. Wea. Rev. (2019) 147 (3): 1047–1064Description:Forecast uncertainty associated with the prediction of snowfall amounts is a complex superposition of the uncertainty about precipitation amounts and ...2019 | Journal of Geophysical Research: Oceans,;Description:Stratification of the upper few meters of the ocean limits the penetration depth of wind mixing and the vertical distribution of atmospheric fluxes. S...Tropospheric Ozone Assessment Report: Tropospheric ozone from 1877 to 2016, observed levels, trends and uncertaintiesCite2019 | Elem Sci Anth, 7(1), p.39.Description:From the earliest observations of ozone in the lower atmosphere in the 19th century, both measurement methods and the portion of the globe observed ha...Summertime Atmospheric Boundary Layer Gradients of O-2 and CO2 over the Southern OceanCite2019 | Journal of Geophysical Research: Atmospheres, 124, 13439-13456Description:We present airborne observations of the vertical gradient of atmospheric oxygen (δ (O2/N2)) and carbon dioxide (CO2) through the atmospheric boundary...Wet Scavenging in WRF-Chem Simulations of Parameterized Convection for a Severe Storm During the DC3 Field CampaignCite2019 | Journal of Geophysical Research: Atmospheres, 124, 7413–7428Description:Deep convection can transport surface moisture and pollution from the planetary boundary layer to the upper troposphere (UT) within a few minutes. The...Methane source attribution in a US dry gas basin using spatial patterns of ground and airborne ethane and methane measurementsCitePersonal Author:Mielke-Maday, Ingrid ;Schwietzke, Stefan...2019 | Elem Sci Anth, 7(1), p.13.Description:An intensive coordinated airborne and ground-based measurement study was conducted in the Fayetteville Shale in northwestern Arkansas during September...Radiative Influence of Horizontally Oriented Ice Crystals over Summit, GreenlandCite2019 | Journal of Geophysical Research: Atmospheres, 124, 12141-12156Description:Ice crystals commonly adopt a horizontal orientation under certain aerodynamic and electrodynamic conditions that occur in the atmosphere. While the r...Regional Widening of Tropical Overturning: Forced Change, Natural Variability, and Recent TrendsCite2019 | Journal of Geophysical Research: Atmospheres, 124(12), 6104-6119Description:The width of the tropical Hadley circulation (HC) has garnered intense interest in recent decades, owing to the emerging evidence for its expansion in...Toward a Better Regional Ozone Forecast Over CONUS Using Rapid Data Assimilation of Clouds and Meteorology in WRF-ChemCite2019 | Journal of Geophysical Research: Atmospheres, 124, 13576-13592Description:Accuracy of cloud predictions in numerical weather models can considerably impact ozone (O-3) forecast skill. This study assesses the benefits in surf...Personal Author:Thompson, Anne M. ;Smit, Herman G. J....2019 | Bull. Amer. Meteor. Soc. (2019) 100 (1): 155–171.Description:The ozonesonde is a small balloon-borne instrument that is attached to a standard radiosonde to measure profiles of ozone from the surface to 35 km wi...2019 | Geophysical Research Letters, 46, 1061-1069.Description:Convective systems dominate the vertical transport of aerosols and trace gases. The most recent in situ aerosol measurements presented here show that ...Evaluating Simulations of Interhemispheric Transport: Interhemispheric Exchange Time Versus SF6 AgeCite2019 | Geophysical Research Letters, 46, 1113-1120.Description:Two recent studies using sulfur hexafluoride (SF6) observations to evaluate interhemispheric transport in two different ensembles of atmospheric chemi...Spatial Distribution of Melt Season Cloud Radiative Effects Over Greenland: Evaluating Satellite Observations, Reanalyses, and Model Simulations Against In Situ MeasurementsCite2019 | Journal of Geophysical Research: Atmospheres, 124, 57-71Description:Arctic clouds can profoundly influence surface radiation and thus surface melt. Over Greenland, these cloud radiative effects (CRE) vary greatly with ...Incorporation of the Rotor-Equivalent Wind Speed into the Weather Research and Forecasting Models Wind Farm ParameterizationCitePersonal Author:Redfern, Stephanie ;Olson, Joseph B....2019 | Mon. Wea. Rev. (2019) 147 (3): 1029–1046Description:Wind power installations have been increasing in recent years. Because wind turbines can influence local wind speeds, temperatures, and surface fluxes...Personal Author:Shaw, William J. ;Berg, Larry K....2019 | Bull. Amer. Meteor. Soc. (2019) 100 (9): 1687–1699.Description:In 2015 the U.S. Department of Energy (DOE) initiated a 4-yr study, the Second Wind Forecast Improvement Project (WFIP2), to improve the representatio...A Process-Based Climatological Evaluation of AIRS Level 3 Tropospheric Thermodynamics over the High-Latitude ArcticCitePersonal Author:Sedlar, Joseph ;Tjernström, Michael2019 | J. Appl. Meteor. Climatol. (2019) 58 (8): 1867–1886Description:Measurements from spaceborne sensors have the unique capacity to fill spatial and temporal gaps in ground-based atmospheric observing systems, especia...Winter Storm Conditions Leading to Excessive Runoff above California’s Oroville Dam during January and February 2017CitePersonal Author:White, Allen B. ;Moore, Benjamin J....2019 | Bull. Amer. Meteor. Soc. (2019) 100 (1): 55–70.Description:During winter 2016/17, California experienced numerous heavy precipitation events linked to land-falling atmospheric rivers (ARs) that filled reservoi...