Results 41 to 50 of about 447 (185)

Fish welfare in a changing world: New developments and current challenges

Journal of Fish Biology, EarlyView.
Abstract The welfare of non‐human animals is central to ethical discussions on animal use, with increasing attention to fish welfare across research, aquaria, aquaculture, and fisheries. This paper reviews current theoretical approaches to animal welfare and recent advances in defining and assessing fish welfare since the seminal paper by Huntingford ...
Sonia Rey Planellas, João L. Saraiva, Eliane Gonçalves‐de‐Freitas, Pablo Arechavala‐Lopez, Bernice Bovenkerk, Michael Breen, Steven J. Cooke, Martin Føre, Lene Northwood, Lars Helge Stien, Sunil Kadri, Chris Noble, Jonatan Nilsson, Fernando Rodriguez, Cosme Salas, Peter Sandøe, Hans van de Vis   +16 more
wiley   +1 more source

Geomagnetic Secular Variation Anomalies in the GDR

Journal of geomagnetism and geoelectricity, 1978
For about 25 years, measurements of the magnetic components have been carried out at repeat stations in the territory of the GDR. All measurements at common stations of the magnetic surveys for the epochs 1901, 1935, and 1957 were compared. The results of the investigation indicate secular variation anomalies with amplitudes of about 3–4 nT/year. These
openaire   +2 more sources

Secular variations of the geomagnetic field at the African plate

Geofizicheskiy Zhurnal, 2017
Geomagnetic secular variations at the African plate consist of shortperiod and longperiod components. Shortperiod SV depends on solar activity. To separate longperiod SV for the Athens magnetic observatories with confidence is impossible so, as rows of mean year values at most observatories are short. We used the data of fifteen observatories, but only
Sumaruk, Yu. P., Sumaruk, T. P.
openaire   +3 more sources

Interplanetary external driven quasidynamo as the origin of geomagnetic jerks correlated with length of day and gravity anomaly

Contributions to Geophysics and Geodesy, 2018
We report phenomenological inevitable correlation between the Sun’s magnetic field oscillation through the Earth and the Jupiter, with sinusoidal geomagnetic jerks observed at the Earth, additionally aligned with the gravity and length of day sinusoidal ...
Mohsen LUTEPHY
doaj   +1 more source

Secular variation of Geomagnetic Elements at Alibag-

MAUSAM, 1969
Attempts are made to represent secular variations of geomagnetic elements (H. Z and D) of Alibag by fitting polynomials of third order to the observed annual mean values for the years 1905-65. The coefficients of the fitted curve account for more than 99 percent of the total variation in case of H and D and 98 per cent in case of z.
DRK RAO, RK BANSAL
openaire   +1 more source

Geomagnetic Secular Variation, 1962.5 to 1967.5 [PDF]

Geophysical Journal International, 1974
Summary Mean values of observatory geomagnetic data for the intervals 1960.0 to 1965.0 and 1965.0 to 1970.0 are subjected to spherical harmonic analysis to obtain coefficients of the main magnetic field. Since the same set of 118 observatories was used for each interval, the difference between the two sets of coefficients gives a reliable measure of ...
S. R. C. Malin, A. D. Clark
openaire   +1 more source

Scaling of the geomagnetic secular variation timescale

Geophysical Journal International
SUMMARY The ratio of the magnetic power spectrum and the secular variation spectrum measured at the Earth’s surface provides a timescale $\tau _{\rm sv}(l)$ as a function of spherical harmonic degree l. $\tau _{\rm sv}$ is often assumed to be representative of timescales related to the dynamo inside the outer core and its scaling with l ...
Yue-Kin Tsang, Chris A Jones
openaire   +3 more sources

Geomagnetic Secular Variation at the Indian Observatories.

Journal of geomagnetism and geoelectricity, 1997
Annual mean values of geomagnetic field components D, H and Z for all days and quiet days at six observatories are analysed to investigate the secular variations and geomagnetic jerks in the Indian region. Secular trends show a region of demarkation between equatorial and low latitude stations.
Bhardwaj, S. K., Rangarajan, G. K.
openaire   +2 more sources

Rapid Surface Intensification of the Gulf Stream Since 2014

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract The warm, swift Gulf Stream (GS) plays a key role in shaping weather and climate patterns across the North Atlantic. Using 31‐year (1993–2023) of continuous satellite altimeter observations, we identify a pronounced intensification of the free‐flowing GS after its separation from the coast beginning around 2014 and persisting thereafter ...
Shenfu Dong, Marlos Goes, Denis Volkov, Sang‐Ki Lee, Hosmay Lopez   +4 more
wiley   +1 more source

Global Plasmaspheric Refilling Rates Inferred From Deep‐Learning Electron Density Reconstructions

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract As a key process in magnetosphere‐ionosphere coupling, plasmaspheric refilling is a long‐standing focus in space physics. In this study, we develop a global electron density (GEO‐NE) model based on a CNN‐Transformer architecture, and use the model to investigate plasmaspheric electron density refilling rates. Using global electron density maps
Zhenyu Guo, Xuzhe Xu, Xiongdong Yu, Zhigang Yuan, Hang Tian, Zuxiang Xue, Dan Deng   +6 more
wiley   +1 more source