Results 51 to 60 of about 21,732 (225)

A new smoother method for treating different timescales in variational data assimilation for coupled systems

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We propose a new method for treating different timescales in coupled variational data assimilation for atmosphere–ocean models. The approach involves a series of short‐window coupled assimilations (red arrows in the schematic) followed by a long‐window correction to the ocean fields (blue arrow).
Amos S. Lawless, Nancy K. Nichols, Tsz Yan Leung, Shaerdan Shataer   +3 more
wiley   +1 more source

Stratospheric and tropospheric seasonality and its implications for observation requirements in numerical weather prediction

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Daily time series of zonal‐mean zonal wind (m·s−1) at 10 hPa and 60° N from 1950 to 2021 from the ERA5 reanalysis. This shows huge variability in some seasons and very little in others. We provide evidence that high‐level observations, radiosonde and satellite, are more important during the extended winter season with its very large variability ...
Bruce Ingleby, Inna Polichtchouk
wiley   +1 more source

Quasi-geostrophic modes in the Earth's fluid core with an outer stably stratified layer [PDF]

, 2015
Seismic waves sensitive to the outermost part of the Earth's liquid core seem to be affected by a stably stratified layer at the core-mantle boundary.
Schaeffer, Nathanaël, Vidal, Jérémie
core   +5 more sources

Extreme rainfall in Madeira: the June 2023 weather event

Weather, EarlyView.
This study investigates the meteorological conditions behind the extreme precipitation event on 6 June 2023 over Madeira Island, Portugal. The event set a national daily record of 497.5mm and was unusual for occurring in early summer, as most extremes in the region occur in winter.
Tiago M. Ferreira, Tomás H. Gaspar, Maria O. Molina, Ricardo M. Trigo, Ricardo Deus, Alexandre M. Ramos   +5 more
wiley   +1 more source

Tropical Atlantic geostrophic currents and ship drifts

Journal of Geophysical Research: Oceans, 1987
Historical ship drifts and geostrophic surface currents obtained from hydrographic data are compared in the Tropical Atlantic ocean. The major components of the current system (North Equatorial Current, North Equatorial Countercurrent, South Equatorial Current) are clearly depicted by the two data sets. The main difference between the two fields is the
openaire   +3 more sources

Surface Vector Current Retrieval by Single-Station High-Frequency Surface Wave Radar Based on Ocean Dynamics in the Taiwan Strait

Remote Sensing
In order to address the issue of limited common coverage and high cost in mapping ocean surface vector current by two (or more) high-frequency surface wave radars, this paper proposes a single-station surface wave radar vector current inversion algorithm.
Li Wang, Mengyan Feng, Weihua Ai, Xiongbin Wu, Xianbin Zhao, Shensen Hu   +5 more
doaj   +1 more source

Observational Analysis of the Formation Reasons and Evolution Law of Winter Counter-Wind Current in Jiazi Sea Area of Northeastern South China Sea

Journal of Marine Science and Engineering, 2022
Based on the observational data of wind, current, and sea surface temperature in the Jiazi sea area of the northeastern South China Sea in 2018 and the satellite remote sensing data of sea surface temperature in the northern South China Sea, this paper ...
Yizhan Chen, Yonggang Cao, Shizhi Liao, Yuan Ma, Yuqiang Liu, Yongzhong Ouyang, Rong Xiang   +6 more
doaj   +1 more source

Palaeowinds and depositional conditions from Holocene loess in Sweden and Finland

Boreas, EarlyView.
The nature of deglacial and Holocene wind regimes in Fennoscandia is debated, as is the degree to which wind‐blown loess deposits exist in the region. Loess deposits in Fennoscandia are often relatively thin, discontinuous and less well‐sorted than typical loess, and questions remain over the degree of their post‐depositional reworking and the impact ...
Calum J. Edward, Thomas Stevens, Anu Kaakinen, Jukka‐Pekka Palmu, Juha‐Pekka Lunkka, Ramona Schneider, Bjarne Almqvist   +6 more
wiley   +1 more source

The Staircase Chart: Visualising Vertical and Cross‐Shelf Movements and Dispersal of Early‐Life Fish, Applied to Japanese Jack Mackerel

Fisheries Oceanography, EarlyView.
ABSTRACT Dispersal during early life stages is a critical process shaping marine fish connectivity and population dynamics, yet direct field observations at the individual level remain elusive. This has limited our understanding of the factors controlling dispersal, including the impact of active swimming by larvae and juveniles. Here, we present a new
Tatsuya Sakamoto, Daichi Muto, Motomitsu Takahashi, Chiyuki Sassa, Toyoho Ishimura   +4 more
wiley   +1 more source

Structure and dynamics of the Pacific North Equatorial Subsurface Current

Scientific Reports, 2020
The North Equatorial Subsurface Current (NESC) has recently been found to flow westward below the North Equatorial Countercurrent in the subsurface layer across the Pacific Ocean.
Xiang Li, Ya Yang, Rui Li, Linlin Zhang, Dongliang Yuan   +4 more
doaj   +1 more source