INTERANNUAL VARIATIONS IN BENTHIC FORAMINIFERA ASSEMBLAGES UNDER MARICULTURE SITES IN ALEKSEEV BAY (POPOV ISLAND, THE SEA OF JAPAN)

Author(s):  
Alexandra Romanova ◽  
Alexandra Romanova ◽  
Tatyana Tarasova ◽  
Tatyana Tarasova
2017 ◽  
Vol 18 (11) ◽  
pp. 2893-2906 ◽  
Author(s):  
Kazuaki Yasunaga ◽  
Masashi Tomochika

Abstract Long-term changes in the monthly precipitation along the coastal areas of the Sea of Japan are examined using monthly operational observation data from the Japan Meteorological Agency. The monthly precipitation in December significantly increased from the mid-1980s to 2015, even though no remarkable changes were found in January, February, or November. Significant positive trends in the December precipitation extend widely over the coastal areas of the Sea of Japan, and the amounts increase to approximately 50% of the climatological precipitation in December at most observational stations. The interannual variations in other variables, including the monthly accumulated actual sunshine duration, days with lightning detection, and satellite-retrieved outgoing longwave radiation, also show significant trends that are consistent with the precipitation increase in December. The effect of the sea surface temperature (SST) on precipitation change is discussed based on correlation and regression analyses. The interannual variations in the December precipitation averaged over the observational stations near the Sea of Japan are significantly correlated with the SSTs in the prior month (November). However, the SST increase in November is insufficient to account for the increase in precipitation. In addition, it was found that the satellite-retrieved surface wind speed in December has grown stronger in recent years over the Sea of Japan. It is suggested that the stronger wind corresponds to the enhanced monsoonal flow and is the primary cause of the precipitation increase in December.


2015 ◽  
Vol 143 (1) ◽  
pp. 54-63 ◽  
Author(s):  
Yuta Ando ◽  
Masayo Ogi ◽  
Yoshihiro Tachibana

Abstract Negative Arctic Oscillation (AO) and western Pacific (WP) indices persisted from October to December 2012 in the Northern Hemisphere. For the first time, the monthly AO and WP were both negative for three consecutive months since records have been kept. Although in general negative AO and WP phases cause Siberia, East Asia, and Japan to be abnormally cold, Japan was relatively warm in October 2012 even though both the AO and WP were strongly negative. The temperature of the Sea of Japan reached a record-breaking high in October 2012, and it was found that heating by these very warm waters, despite the small size of the Sea of Japan, overwhelmed the cooling effect of the strongly negative AO and WP in October. Linear regression analyses showed that Japan tends to be warm in years when the Sea of Japan is warm. Consequently, the temperature over Japan is controlled by interannual variations of small-scale oceanic phenomena as well as by large-scale atmospheric patterns. Previous studies have ignored such small-scale oceanic influences on island temperatures.


2012 ◽  
Vol 132 (6) ◽  
pp. 560-567 ◽  
Author(s):  
Megumu Miki ◽  
Toru Miki ◽  
Akira Asakawa ◽  
Takatoshi Shindo ◽  
Shigeru Yokoyama

2011 ◽  
Vol 131 (12) ◽  
pp. 973-978 ◽  
Author(s):  
Fumiyuki Fujii ◽  
Masaru Ishii ◽  
Mikihisa Saito ◽  
Michihiro Matsui ◽  
Daisuke Natsuno

Author(s):  
G.G. Tkachenko

Морское побережье является одной из самых выраженных естественных географических границ, которая одновременно разделяет и связывает географические структуры суши морей или океанов. В основе формирования типов природопользования в прибрежных зонах, как и на других типах географического пространства, лежит природноресурсный потенциал. Природноресурсный потенциал и типы природопользования как явления пространственнодифференцированные должны быть рассмотрены, прежде всего, в рамках классических географических подходов и оценок, таких как районирование территории и акватории. При этом пространственные сочетания наземных и морских природных, природноресурсных компонентов рассматриваются как важнейшие предпосылки инфраструктурного и хозяйственного развития прибрежных регионов. Необходимым этапом природноресурсного районирования является выявление границ, при пересечении которых существенно меняются природные ресурсы и условия. Данная работа выполнена на примере рассмотрения минеральных ресурсов прибрежных муниципальных образований и является частью исследования природноресурсных сочетаний зоны сушаокеан Дальнего Востока России в рамках изучения пространственной дифференциации факторов, условий и ограничений формирования и развития структур природопользования в прибрежной зоне Тихоокеанской России с учетом воздействия экстремальных природных процессов и явлений. Дана сравнительная характеристика месторождений минерального сырья российской части побережья Японского моря. Определена их видовая и географическая структура. На основе того, что месторождения минерального сырья сгруппированы в 8 основных ресурсных групп ввыполнено районирование российской части побережья Японского моря по сочетанию основных видов минеральных ресурсов. Выделены типы муниципальных образований по сочетанию минеральных ресурсов и показаны особенности каждого из них. Выделены шесть районов по сочетанию минеральных ресурсов. В связи с необходимостью учета географической особенности в сочетании со спецификой минеральных ресурсов, северной и южной частям территории одного типа районов присвоены свои собственные названия. По результатам исследования была построена карта. The seacoast is one of the most pronounced natural geographical boundaries, which divides and connects simultaneously the geographical structures of the land, seas or oceans. The formation of the types of nature management in coastal zones, as well as on other types of geographical space, is based on the natural resource potential. Being spatially differentiated phenomena, the natural resource potential and the types of environmental management should be considered, first of all, within the framework of classical geographical approaches and assessments, such as zoning of the territory and water areas. In this case, spatial combinations of the land and sea natural, naturalresource components are considered as the most important prerequisites for the infrastructure and economic development of coastal regions. Identification of borders, at the intersection of which the natural resources and conditions change significantly, is a necessary stage of natural resource zoning. This work is carried out by example of consideration of mineral resources of coastal municipal unions and appears to be a part of studies of naturalresource combinations of the landocean zone of the Russian Far East in the framework of studies of spatial differentiation of factors, conditions and restrictions of formation and development of structures of nature management in the coastal zone of Pacific Russia, taking into account the influence of extreme natural processes and phenomena. The comparative characteristic of mineral deposits of the Russian part of the coast of the Sea of Japan is given. Their species and a geographical structure are determined. Based on the fact that the mineral deposits are grouped into eight main resource groups, zoning of the Russian part of the coast of the Sea of Japan by a combination of the main types of mineral resources is performed. The types of municipalities are allocated by a combination of mineral resources and their features are shown. Six areas are singled out by a combination of mineral resources. Due to the need to take into account the geographical features in combination with the specifics of mineral resources, the northern and southern parts of the territory of one type of areas have obtained their own names. According to the results of the studies, the map has been compiled.


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