With eight islands, complex coastlines and bottom topography, strong wind curls, frequent upwelling fronts, the Southern California Bight (SCB) is an area with eddy activity. By applying automated detection scheme to a 12 year high‐resolution numerical product of oceanic circulation in SCB, three‐dimensional data set developed. It includes information for each eddy's location, polarity, intensity, size, boundary, moving path at nine vertical levels. Through series statistical analyses...

Abstract We examined atmospheric responses to 35,000+ oceanic eddies in the Kuroshio Extension region during period of 2006–2009. Using satellite data, we showed that cold (warm) cause surface winds decelerate (accelerate) and reduce (increase) latent sensible heat fluxes, cloud liquid water, water vapor content, rain rate; all these changes are quantified. Both linear correlation between wind divergence downwind sea temperature (SST) gradient correspondence vorticity crosswind SST support...

Abstract Amongst the variety of oceanic processes running gamut spatiotemporal scales, mesoscale eddies are most common and often have region-specific characteristics. The large kinetic energy inherent to themselves is a strong modulator global climate, ocean circulation, productivity, freshwater transport. This study uses multi-source satellite remote sensing observation data construct multi-parameter eddy dataset for 1993–2019 period, which differs significantly from few previous published...

Abstract The Kuroshio Extension region is well known for its strong eddy activity. In this paper, using satellite altimetry‐measured sea surface height anomaly data from 1993 to 2012 in an extended (140–180°E, 25–45°N), we analyze characteristics: size, polarity, lifetime, intensity, trajectory, and spatial temporal distributions. Using temperature salinity vertical profiles measured by Argo floats, examine the impact on stratification. During 20‐year period, 7,574 eddies are identified...

Abstract Chlorophyll rings (CRs) are defined as elevated chlorophyll along eddy peripheries and have been observed in anticyclonic oceanic eddies occasionally. This study presents observations of CRs around both cyclonic from a large observational data set. An innovative algorithm is developed to identify satellite sea level anomalies near-surface concentration the North Pacific Ocean between 2003 2010. The results show that only 1% mesoscale associated with CRs, which implies not...

Using collocated altimetry sea surface height anomalies (SSHA) and Argo profiles within detected eddies, we investigated structures of temperature, salinity, potential density, geostrophic current, mixed layer depth (MLD), vorticity (PV), buoyancy frequency (N) in the Kuroshio Extension (KE) region under influences oceanic eddies. We identified 54,302 eddies (snapshots) KE during period 1999–2013. The composite analysis showed that changes physical parameters modulated by climatological...

Oceanic mesoscale cyclonic (anticyclonic) eddies usually have cold (warm) cores and counterclockwise (clockwise) flow fields in the Northern Hemisphere. However, “abnormal” with warm (cold) recently been identified Kuroshio-Oyashio Extension (KOE) region. Here, traditional cold-core (CCEs) anticyclonic warm-core (AWEs) are termed normal eddies, (CWEs) (ACEs) called abnormal eddies. Applying a vector geometry-based automatic eddy detection method to Ocean General Circulation Model for Earth...

Using satellite altimetry sea surface height anomalies (SSHA) and Argo profiles, we investigated eddy’s statistical characteristics, 3-D structures, eddy-induced physical parameter changes, heat/freshwater transports in the South China Sea (SCS). In total, 31,744 cyclonic eddies (CEs, snapshot) 29,324 anticyclonic (AEs) were detected SCS between 1 January 2005 31 December 2016. The composite analysis has uncovered that changes parameters modulated by are mainly confined to upper 400 m....

This study measured the primary productivity (PPeu) of phytoplankton in Wuliangsuhai Lake from April 2014 to January 2019 based on monitoring and on-site exploration 20 sampling points entire lake using a vertically generalized production model (VGPM). The relationship between spatiotemporal variation PPeu environmental factors was also analyzed. Our findings indicated that temporal heterogeneity strong, average annual four seasons significantly different (P < 0.05, F = 54.74), exhibiting...

Abstract. Using multi-source observational data and GLORYS12V1 reanalysis data, we conduct a comparative analysis of different responses two warm eddies, AE1 AE2 in the northern South China Sea, to Typhoon Kalmaegi during September 2014. The findings our research are as follows: (1) for horizontal distribution, area sea surface temperature (SST) decrease by about 31 % (36 %) 0.4 °C (0.6 °C). amplitude, Rossby number (Ro = relative vorticity / Coriolis parameter) eddy kinetic energy (EKE)...

Abstract When a drifter is trapped in an eddy, it makes either cycloidal or looping trajectory. The former case takes place when the translating speed larger than eddy spinning speed. background mean velocity removed, trajectories make loops. Thus, eddies can be detected from trajectory by identifying segments. In this paper, automated scheme developed to identify segments Lagrangian trajectories, based on geometric definition of loop, that is, closing curve with its starting point...

From the analysis of oceanic eddies detected in drifter trajectories Global Drifter Program (GDP) data set, it was found that are asymmetrically distributed across Kuroshio East China Sea: predominant cyclonic (anticyclonic) on western (eastern) sides Kuroshio. This distribution is confirmed by high-resolution numerical modeling output as well. Most these 5~20 km radius, less than local first baroclinic deformation thus categorized submesoscale. The generation mechanism submesoscale...

Traditionally, the origin and evolution of modern arthropod body plans has been revealed through increasing levels appendage specialisation exhibited by Cambrian euarthropods. Here we show significant variation in limb morphologies patterns limb-tagmosis among three early species conventionally assigned to Bradoriida. These arthropods are recovered as a monophyletic stem-euarthropod group (and sister taxon crown-group euarthropods, i.e. Chelicerata, Mandibulata their extinct relatives), thus...

Intermediate-volatility organic compounds (IVOCs) have been recognized as an important contributor to the secondary aerosol (SOA) formation via gas-phase reactions. However, it is unclear whether or not IVOCs-SOA can be produced in aqueous phase. This work investigated oxidation of one model compound IVOCs, dibenzothiophene (DBT). Results show that DBT degraded by both hydroxyl radical and triplet excited states light chromophores (3C*). Aqueous dark was also possible. SOA yields 32% 15%...

The North Pacific Subtropical Countercurrent (STCC) region has high mesoscale eddy activities due to its complex circulation structure. This study divides these eddies into four types: cyclonic cold-core (CCE), anticyclonic warm-core (AWE), (CWE), and (ACE) according the rotation direction of flow field sign average temperature anomaly within after spatial high-pass filtering. CCE ACE are called normal eddies, while CWE named abnormal eddies. Using eddy-resolving model data (OFES), this work...

Based on both satellite remote sensing sea surface temperature (SST) data and numerical model results, SST warming differences in the Mozambique Channel (MC) west of Madagascar Island (MI) were found with respect to east MI along same latitude. The mean is up about 3.0 °C warmer than that MI. exist all year round maximum value appears October. area highest located northern part MC. Potential factors causing anomalies could be wind, heat flux oceanic flow advection. presence results weakening...

The North Pacific Subtropical Countercurrent area (STCC) is high in mesoscale eddy activities. According to the rotation direction of flow field and sign temperature anomaly within eddy, they can be divided into four categories: cyclonic cold-core (CCE), anticyclonic warm-core (AWE), (CWE) (ACE). CCE AWE are called normal eddies, CWE ACE named abnormal eddies. Based on OFES data vector geometry automatic detection method, we find that at sea surface, maximum monthly number CCE, AWE, CWE,...