Eurasian fall snow cover changes have been suggested as a driver for in the Arctic Oscillation and might provide link between sea-ice decline during summer atmospheric circulation following winter. However, mechanism connecting Eurasia to autumn is still under debate. Our analysis based on observations from 820 Russian land stations, moisture transport using Lagrangian approach derived meteorological re-analyses. We show that declining Barents Kara Seas (BKS) acts source enhanced Western...

Abstract Hydrological processes play a key role in the Arctic, as well being an important part of response this region to climate change. The origin moisture arriving (and then precipitating) Arctic is crucial question our understanding hydrological cycle. In attempt answer this, present study uses Lagrangian diagnosis model FLEXPART (FLEXible PARTicle dispersion model) localize main sources for region, analyze their variability and contribution precipitation, consider implications any...

This manuscript applies the recently-created atmospheric river intensity and impacts scale (AR Scale) to European continent. The AR Scale uses an Eulerian perspective based solely upon time series of integrated vapor transport (IVT) over a given geographic location (often represented by model or reanalysis "grid cell"). assigns events with persistent, strong IVT at that one five levels (AR1 AR5), if is too weak short-lived it determined not be AR. AR1 are primarily beneficial, AR2, 3 4...

Abstract The effect of increased populations concentrated in urban areas, coupled with the ongoing threat climate change, means that society is becoming increasingly vulnerable to effects extreme precipitation. study these events therefore a key topic research, their physical basis, impacts, and our adaptation them. From meteorological perspective, main questions are related definition events, changes distribution intensity both globally regionally, dependence on large‐scale phenomena...

Abstract This article contains a review of the transport moisture to Arctic and its effect on Sea Ice Extent (SIE). The includes synthesis our knowledge regarding main sources supplying Arctic, changes experienced over last few decades due variations in moisture, factors that control interannual variability, inherent contrast mechanisms related SIE Arctic. We note precise identification for depends both definition region itself approach used identify sources, with remote regions...

A 90 minute time series of high spatial resolution white-light images solar granulation, obtained at the Swedish Vacuum Solar Tower (Observatorio del Roque de los Muchachos, La Palma), was analyzed to study how physical properties granules changed with size. The observational material corrected for global motions and instrumental profile, a subsonic filter applied. definition granular border adopted using inflection points intensity images, cells were defined as areas including, in addition...

This study investigated the temporal occurrence of dry conditions in seven climatic sub-regions Vietnam during 1980–2017 period. assessment was performed using Standardized Precipitation Evapotranspiration Index (SPEI) and (SPI) at 1 to 24 months timescales. Results show that main periods extreme drought occurred simultaneously throughout country 1992–1993 2003–2004, except for 2015–2016, when it not identified southern region. In addition, a slight lag latitudinally (north–south) beginning...

The properties of the evolution solar granulation have been studied using an 80 minute time series high spatial resolution white-light images obtained with Swedish Vacuum Solar Telescope at Observatorio del Roque de los Muchachos, La Palma. An automatic tracking algorithm has developed to follow individual granules, and a sample 2643 granules analyzed. To check reliability this procedure, we manually tracked 481 compared results both procedures. exponential law gives good fit distribution...

Understanding moisture transport is crucial for understanding continental precipitation and extreme events, which are expected to become substantially more frequent under global warming conditions. In this work, the influence of major sources on during peak month estimated compared with climatological patterns. The results show a general change in pattern contribution primary source (the highest contribution) events. Most reduction their area notable total precipitation.

From the inversion of a time series high resolution slit spectrograms obtained from quiet sun, spatial and temporal distribution thermodynamical quantities vertical flow velocity is derived as function logarithmic optical depth geometrical height. Spatial coherence phase shift analyzes between temperature depict height variation these physical for structures different size. An average granular cell model presented, showing granule-intergranular lane stratification temperature, velocity, gas...

Abstract. In this study we use the term moisture transport for precipitation a target region as coming to from its major sources resulting in over (MTP). We have identified changes pattern of Arctic region, Ocean, and 13 main subdomains concurrent with sea ice decline that occurred 2003. The consists general decrease summer enhanced autumn early winter, different contributions depending on source ocean subregion. is statistically significant consistent vertically integrated fluxes frequency...

Abstract. Changes in the atmospheric moisture transport have been proposed as a vehicle for interpreting some of most significant changes Arctic region. The increasing over during last decades is not strongly associated with evaporation that takes place within area itself, despite fact sea ice cover decreasing. Such an increment consistent and more dependent on from extratropical regions to has increased recent expected increase warming climate. This could be due either circulation patterns...

A photometric analysis of the sub-structure a granular light bridge in large solar pore is performed. The data consist 66 min time series white images ( Å ± 50 Å) an active region NOAA 7886 obtained at Swedish Vacuum Solar Telescope on La Palma, Canary Islands. can be resolved into assembly small grains embedded diffuse background with intensity about 85% mean photospheric (Iphot). Following temporal evolution these sub-structures their irregular motions inside bridge, proper velocities up...

From the inversion of a time series high resolution slit spectrograms obtained from quiet sun, spatial and temporal distribution thermodynamical quantities vertical flow velocity is derived as function optical depth () geometrical height (z). Spatial coherence phase shift analyses between temperature depict variation these physical for structures different size. An average granular cell model presented, showing granule-intergranular lane stratification temperature, velocity, gas pressure...

Abstract This study presents the first climatological analysis of heat waves in Cuba from 1951 to 2023. Here we define a wave as period at least three consecutive days which daily maximum and minimum temperatures exceed their respective calendar-day 99th percentile. Our detected total number 393 (∼ 5.4 events per year over regions (western, central eastern) during period, distributed ∼ 3.1 dry season (from November April) 2.3 rainy May October). The highest frequency was recorded western...

In recent years, the Arctic has become a subject of special interest due to drastic effect climate change over region. Despite that there are several mechanisms influence region; some studies have suggested significant influences moisture transport observed loss sea ice. Moisture can affect region in different ways: direct precipitation region, radiative from cloud cover and through release latent heat. Atmospheric rivers (ARs) represent one main events involved tropics mid-latitudes despite...