Search Results - "Wit, T. Dudok"

Recalibration of the Sunspot-Number: Status Report by Clette, F., Lefèvre, L., Chatzistergos, T., Hayakawa, H., Carrasco, V. M. S., Arlt, R., Cliver, E. W., Wit, T. Dudok de, Friedli, T. K., Karachik, N., Kopp, G., Lockwood, M., Mathieu, S., Muñoz-Jaramillo, A., Owens, M., Pesnell, D., Pevtsov, A., Svalgaard, L., Usoskin, I. G., Driel-Gesztelyi, L. van, Vaquero, J. M.

“…We report progress on the ongoing recalibration of the Wolf sunspot number (SN) and group-sunspot number (GN) following the release of version 2.0 of SN in…”
Get full text

Recent variability of the solar spectral irradiance and its impact on climate modelling by Ermolli, I, Matthes, K, Dudok de Wit, T, Krivova, N. A, Tourpali, K, Weber, M, Unruh, Y. C, Gray, L, Langematz, U, Pilewskie, P, Rozanov, E, Schmutz, W, Shapiro, A, Solanki, S. K, Woods, T. N

“…The lack of long and reliable time series of solar spectral irradiance (SSI) measurements makes an accurate quantification of solar contributions to recent…”
Get full text

Statistical Evidence for Contributions of Flares and Coronal Mass Ejections to Major Solar Energetic Particle Events by Trottet, G., Samwel, S., Klein, K.-L., Dudok de Wit, T., Miteva, R.

“…Solar energetic particle (SEP) events are related to flares and coronal mass ejections (CMEs). This work is a new investigation of statistical relationships…”
Get full text

Plasma Double Layers at the Boundary Between Venus and the Solar Wind by Malaspina, D. M., Goodrich, K., Livi, R., Halekas, J., McManus, M., Curry, S., Bale, S. D., Bonnell, J. W., Wit, T. Dudok, Goetz, K., Harvey, P. R., MacDowall, R. J., Pulupa, M., Case, A. W., Kasper, J. C., Korreck, K. E., Larson, D., Stevens, M. L., Whittlesey, P.

“…The solar wind is slowed, deflected, and heated as it encounters Venus's induced magnetosphere. The importance of kinetic plasma processes to these…”
Get full text

Response of Solar Irradiance to Sunspot-area Variations by Dudok de Wit, T., Kopp, G., Shapiro, A., Witzke, V., Kretzschmar, M.

“…One of the important open questions in solar irradiance studies is whether long-term variability (i.e., on timescales of years and beyond) can be reconstructed…”
Get full text

Finding the best proxies for the solar UV irradiance by Dudok de Wit, T., Kretzschmar, M., Lilensten, J., Woods, T.

“…Solar UV emission has a profound impact on the upper terrestrial atmosphere. Because of instrumental constraints, however, solar proxies often need to be used…”
Get full text

A Merged Search‐Coil and Fluxgate Magnetometer Data Product for Parker Solar Probe FIELDS by Bowen, T. A., Bale, S. D., Bonnell, J. W., Dudok de Wit, T., Goetz, K., Goodrich, K., Gruesbeck, J., Harvey, P. R., Jannet, G., Koval, A., MacDowall, R. J., Malaspina, D. M., Pulupa, M., Revillet, C., Sheppard, D., Szabo, A.

“…NASA's Parker Solar Probe (PSP) mission is currently investigating the local plasma environment of the inner heliosphere (<0.25 R⊙) using both in situ and…”
Get full text

Reconstruction of Polarization Properties of Whistler Waves From Two Magnetic and Two Electric Field Components: Application to Parker Solar Probe Measurements by Colomban, L., Agapitov, O. V., Krasnoselskikh, V., Kretzschmar, M., Dudok de Wit, T., Karbashewski, S., Mozer, F. S., Bonnell, J. W., Bale, S., Malaspina, D., Raouafi, N. E.

“…The search‐coil magnetometer (SCM) aboard Parker Solar Probe (PSP) measures the 3 Hz to 1 MHz magnetic field fluctuations. During Encounter 1, the SCM operated…”
Get full text

Whistler Wave Observations by Parker Solar Probe During Encounter 1: Counter-propagating Whistlers Collocated with Magnetic Field Inhomogeneities and their Application to Electric Field Measurement Calibration by Karbashewski, S., Agapitov, O. V., Kim, H. Y., Mozer, F. S., Bonnell, J. W., Froment, C., de Wit, T. Dudok, Bale, Stuart D., Malaspina, D., Raouafi, N. E.

“…Abstract Observations of the young solar wind by the Parker Solar Probe (PSP) mission reveal the existence of intense plasma wave bursts with frequencies…”
Get full text

Parker Solar Probe Evidence for the Absence of Whistlers Close to the Sun to Scatter Strahl and to Regulate Heat Flux by Cattell, C., Breneman, A., Dombeck, J., Hanson, E., Johnson, M., Halekas, J., Bale, S. D., Dudok de Wit, T., Goetz, K., Goodrich, K., Malaspina, D., Pulupa, M., Case, T., Kasper, J. C., Larson, D., Stevens, M., Whittlesey, P.

“…Abstract Using the Parker Solar Probe FIELDS bandpass-filter data and SWEAP electron data from Encounters 1 through 9, we show statistical properties of…”
Get full text

First Results From the SCM Search‐Coil Magnetometer on Parker Solar Probe by Dudok de Wit, T., Krasnoselskikh, V. V., Agapitov, O., Froment, C., Larosa, A., Bale, S. D., Bowen, T., Goetz, K., Harvey, P., Jannet, G., Kretzschmar, M., MacDowall, R. J., Malaspina, D., Martin, P., Page, B., Pulupa, M., Revillet, C.

“…Parker Solar Probe is the first mission to probe in situ the innermost heliosphere, revealing an exceptionally dynamic and structured outer solar corona. Its…”
Get full text

Determination of the most pertinent EUV proxy for use in thermosphere modeling by Dudok de Wit, T., Bruinsma, S.

“…Two major issues in the specification of the thermospheric density are the definition of proper solar inputs and the empirical modeling of thermosphere…”
Get full text

The Evolution of the 1/f Range within a Single Fast-solar-wind Stream between 17.4 and 45.7 Solar Radii by Davis, Nooshin, Chandran, B. D. G., Bowen, T. A., Badman, S. T., de Wit, T. Dudok, Chen, C. H. K., Bale, S. D., Huang, Zesen, Sioulas, Nikos, Velli, Marco

“…Abstract The power spectrum of magnetic field fluctuations in the fast solar wind ( V SW > 500 km s −1 ) at magnetohydrodynamic scales is characterized by two…”
Get full text

Broadband Electrostatic Waves near the Lower-hybrid Frequency in the Near-Sun Solar Wind Observed by the Parker Solar Probe by Zhao, Jinsong, Malaspina, David M., Dudok de Wit, T., Pierrard, Viviane, Voitenko, Yuriy, Lapenta, Giovanni, Poedts, Stefaan, Bale, Stuart D., Kasper, Justin C., Larson, Davin, Livi, Roberto, Whittlesey, Phyllis

“…Abstract Using Parker Solar Probe observations, this Letter reports for the first time the existence of broadband electrostatic waves below the electron…”
Get full text

A solar cycle clock for extreme space weather by Chapman, S. C., Dudok de Wit, T.

“…The variable solar cycle of activity is a long-standing problem in physics. It modulates the overall level of space weather activity at earth, which in turn…”
Get full text

Methods for Characterising Microphysical Processes in Plasmas by Dudok de Wit, T., Alexandrova, O., Furno, I., Sorriso-Valvo, L., Zimbardo, G.

“…Advanced spectral and statistical data analysis techniques have greatly contributed to shaping our understanding of microphysical processes in plasmas. We…”
Get full text

Kinetic‐Scale Turbulence in the Venusian Magnetosheath by Bowen, T. A., Bale, S. D., Bandyopadhyay, R., Bonnell, J. W., Case, A., Chasapis, A., Chen, C. H. K., Curry, S., Dudok de Wit, T., Goetz, K., Goodrich, K., Gruesbeck, J., Halekas, J., Harvey, P. R., Howes, G. G., Kasper, J. C., Korreck, K., Larson, D., Livi, R., MacDowall, R. J., Malaspina, D. M., Mallet, A., McManus, M. D., Page, B., Pulupa, M., Raouafi, N., Stevens, M. L., Whittlesey, P.

“…While not specifically designed as a planetary mission, NASA's Parker Solar Probe (PSP) mission uses a series of Venus gravity assists (VGAs) in order to…”
Get full text

Highly Structured Slow Solar Wind Emerging From an Equatorial Coronal Hole by Bale, S D, Badman, S T, Bonnell, J W, Bowen, T A, Burgess, D, Case, A W, Cattell, C A, Chandran, B D G, Chaston, C C, Chen, C H K, Drake, J. F., Wit, T Dudok de, Eastwood, J P, Ergun, R E, Farrell, W M, Fong, C, Goetz, K, Goldstein, M, Goodrich, K A, Harvey, P R, Horbury, T S, Howes, G G, Kasper, J C, Kellogg, P J, Klimchuk, J A, Korreck, K E, Krasnoselskikh, V V, Krucker, S, Laker, R, Larson, D E, MacDowall, R J, Maksimovic, M, Malaspina, D M, Martinez-Oliveros, J, McComas, D J, Meyer-Vernet, N, Moncuquet, M, Mozer, F S, Phan, T D, Pulupa, M, Salem, C, Stansby, D, Stevens, M, Szabo, A, Velli, M, Woolley, T, Wygant, J R

“…At solar minimum, the solar wind is observed at high solar latitudes as a predominantly fast (> 500 km/s), highly Alfvenic, rarefied stream of plasma…”
Get full text

Fast Segmentation of Solar Extreme Ultraviolet Images by Wit, TDudok

“…A segmentation scheme for identifying large-scale structures (coronal holes, active regions, etc.) in solar extreme ultraviolet images, is presented. Unlike…”
Get full text

Determining the wavelength of Langmuir wave packets at the Earth's bow shock by KRASNOSELSKIKH, V. V, DUDOK DE WIT, T, BALE, S. D

“…The propagation of Langmuir waves in plasmas is known to be sensitive to density fluctuations. Such fluctuations may lead to the coexistence of wave pairs that…”
Get full text