Short-term forecasting for sea surface temperature based on tidal observatory observations

2020 ◽  
Vol 31 (2) ◽  
pp. 255-271
Author(s):  
Hyunwoo Park ◽  
Seunghwan Lee ◽  
Eun-Joo Lee ◽  
Younsang Cho ◽  
Yeong Seok Park ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Sea Surface ◽  
Short Term ◽  
Short Term Forecasting

scholarly journals Short-Term Variation of the Surface Flow Pattern South of Lombok Strait Observed from the Himawari-8 Sea Surface Temperature

2019 ◽  
Vol 11 (12) ◽  
pp. 1491 ◽  
Author(s):  
Naokazu Taniguchi ◽  
Shinichiro Kida ◽  
Yuji Sakuno ◽  
Hidemi Mutsuda ◽  
Fadli Syamsudin
Keyword(s):  
Indian Ocean ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Surface Flow ◽  
Sea Surface ◽  
Surface Velocity ◽  
Thermal Plume ◽  
Short Term ◽  
Flow Variation ◽  
The Indian Ocean

Spatial and temporal information on oceanic flow is fundamental to oceanography and crucial for marine-related social activities. This study attempts to describe the short-term surface flow variation in the area south of the Lombok Strait in the northern summer using the hourly Himawari-8 sea surface temperature (SST). Although the uncertainty of this temperature is relatively high (about 0.6 ∘ C), it could be used to discuss the flow variation with high spatial resolution because sufficient SST differences are found between the areas north and south of the strait. The maximum cross-correlation (MCC) method is used to estimate the surface velocity. The Himawari-8 SST clearly shows Flores Sea water intruding into the Indian Ocean with the high-SST water forming a warm thermal plume on a tidal cycle. This thermal plume flows southward at a speed of about 2 m / s . The Himawari-8 SST indicates a southward flow from the Lombok Strait to the Indian Ocean, which blocks the South Java Current flowing eastward along the southern coast of Nusa Tenggara. Although the satellite data is limited to the surface, we found it useful for understanding the spatial and temporal variations in the surface flow field.

scholarly journals Impact of high pCO2 and warmer temperatures on the process of silica biomineralization in the sponge Mycale grandis

2015 ◽  
Vol 73 (3) ◽  
pp. 704-714 ◽  
Author(s):  
Jan Vicente ◽  
Nyssa J. Silbiger ◽  
Billie A. Beckley ◽  
Charles W. Raczkowski ◽  
Russell T. Hill
Keyword(s):  
Surface Temperature ◽  
Ocean Acidification ◽  
Sea Surface Temperature ◽  
Dry Weight ◽  
Sea Surface ◽  
High Pco2 ◽  
Short Term ◽  
Uptake Rates ◽  
Siliceous Sponges

Abstract Siliceous sponges have survived pre-historical mass extinction events caused by ocean acidification and recent studies suggest that siliceous sponges will continue to resist predicted increases in ocean acidity. In this study, we monitored silica biomineralization in the Hawaiian sponge Mycale grandis under predicted pCO2 and sea surface temperature scenarios for 2100. Our goal was to determine if spicule biomineralization was enhanced or repressed by ocean acidification and thermal stress by monitoring silica uptake rates during short-term (48 h) experiments and comparing biomineralized tissue ratios before and after a long-term (26 d) experiment. In the short-term experiment, we found that silica uptake rates were not impacted by high pCO2 (1050 µatm), warmer temperatures (27°C), or combined high pCO2 with warmer temperature (1119 µatm; 27°C) treatments. The long-term exposure experiments revealed no effect on survival or growth rates of M. grandis to high pCO2 (1198 µatm), warmer temperatures (25.6°C), or combined high pCO2 with warmer temperature (1225 µatm, 25.7°C) treatments, indicating that M. grandis will continue to prosper under predicted increases in pCO2 and sea surface temperature. However, ash-free dry weight to dry weight ratios, subtylostyle lengths, and silicified weight to dry weight ratios decreased under conditions of high pCO2 and combined pCO2 warmer temperature treatments. Our results show that rising ocean acidity and temperature have marginal negative effects on spicule biomineralization and will not affect sponge survival rates of M. grandis.

scholarly journals The Use of Generalized Additive Model (GAM) To Assess Fish Abundance and Spatial Occupancy in North-West Bay of Bengal

2019 ◽  
pp. 17-28
Author(s):  
Bandanadam Swathi ◽  
Swarnalatha. V ◽  
Venkatesh Jogu
Keyword(s):  
Remote Sensing ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Generalized Additive Model ◽  
Chlorophyll Concentration ◽  
Additive Model ◽  
Remote Sensing Data ◽  
Sea Surface ◽  
Short Term ◽  
Sensing Data

The remote sensing data, such as sea surface temperature & chlorophyll concentration obtained from various satellites are utilized by Indian National Centre for Ocean Information Services (INCOIS) to provide Potential Fishing Zone (PFZ) advisories to the Indian fishing community which plays a vital role in national GDP. The data on Sea Surface Temperature (SST) is retrieved regularly from thermal-infrared channels of NOAA-AVHRR and chlorophyll concentration (CC) from optical bands of Oceansat-II and MODIS Aqua satellites for the identification of Potential Fishing Zones (PFZ) in Indian water. PFZ information has certain limitations, such as it can't predict the type of fish available in the notified fishing zone. In this dissertation, I have worked towards the development of short-term Hilsa shad predictive capabilities in a sustainable way. An effort has been taken to categorize all essential biological, environmental and climatic signals that have a direct or indirect impact on the Hilsa shad distribution. Remote sensing, ocean biogeochemical modelling, and statistical modelling approach have gained an increasing importance to study the marine ecosystems as-well-as for understanding the dynamics of the oceanic environment. Shad habitat has been studied from the geo-tagged fish catch data and oceanic/ecological indicators as predictor variables. For short-term prediction, the variables have been derived from a biophysical model, configured at INCOIS, using Regional Ocean Model System (ROMS) and remote sensing data. Using generalized additive model (GAM) Catch per Unit Effort (kg h?1) has been calculated as a response variable. Probability maps of predicted habitat with no fishing zone information have been generated using geographic information system.

scholarly journals The Threshold Sea Surface Temperature Condition for Tropical Cyclogenesis

2011 ◽  
Vol 24 (17) ◽  
pp. 4570-4576 ◽  
Author(s):  
Richard A. Dare ◽  
John L. McBride
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Tropical Cyclones ◽  
Sea Surface ◽  
Tropical Cyclogenesis ◽  
Threshold Temperature ◽  
Short Term ◽  
Time Period ◽  
The Mean ◽  
Global Oceans

The analyzed value of sea surface temperature (SST) is examined for all global cases of tropical cyclone formation within 35° latitude of the equator over the period 1981–2008. It is found that 98.3% of formations occur at SST values exceeding 25.5°C. This practical threshold is relatively insensitive to the exact value of maximum wind speed used to define formation. The threshold is sensitive, however, to short-term variations in SST during development. By expanding the time period such that thresholds are calculated based on the maximum SST during the 48-h period leading to genesis, it is found that 99.5% of cyclone formations occur above 25.5°C. It is also found that tropical cyclones form over a narrow temperature range with 90.4% forming over SSTs between 27.5° and 30.5°C when the 48-h period is considered. Without consideration of the 48-h period, an SST threshold of 25.5°C is representative with less than 2% of formations occurring below this value. When the 48-h period is considered, 26.5°C is the equivalent threshold. The response to warming of the global oceans is also examined. Dividing the 27-yr dataset into an earlier versus a later 13.5-yr period, positive but small changes (+0.2°C) occur in the mean formation temperature. There is no detectable shift of the threshold temperature toward a higher value.

scholarly journals Holocene sea-surface temperature variability in the Chilean fjord region

2014 ◽  
Vol 82 (2) ◽  
pp. 342-353 ◽  
Author(s):  
Magaly Caniupán ◽  
Frank Lamy ◽  
Carina B. Lange ◽  
Jérôme Kaiser ◽  
Rolf Kilian ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Sea Surface ◽  
Ice Age ◽  
Large Set ◽  
Short Term ◽  
The Past ◽  
Westerly Winds ◽  
Cold Events ◽  
Glacier Advance

AbstractHere we provide three new Holocene (11–0 cal ka BP) alkenone-derived sea surface temperature (SST) records from the southernmost Chilean fjord region (50–53°S). SST estimates may be biased towards summer temperature in this region, as revealed by a large set of surface sediments. The Holocene records show consistently warmer than present-day SSTs except for the past ~ 0.6 cal ka BP. However, they do not exhibit an early Holocene temperature optimum as registered further north off Chile and in Antarctica. This may have resulted from a combination of factors including decreased inflow of warmer open marine waters due to lower sea-level stands, enhanced advection of colder and fresher inner fjord waters, and stronger westerly winds. During the mid-Holocene, pronounced short-term variations of up to 2.5°C and a cooling centered at ~ 5 cal ka BP, which coincides with the first Neoglacial glacier advance in the Southern Andes, are recorded. The latest Holocene is characterized by two pronounced cold events centered at ~ 0.6 and 0.25 cal ka BP, i.e., during the Little Ice Age. These cold events have lower amplitudes in the offshore records, suggesting an amplification of the SST signal in the inner fjords.

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