Orbitally paced climate variability during the Middle Miocene: High resolution benthic foraminiferal stable-isotope records from the tropical western Pacific

2004 ◽  
pp. 321-337 ◽  
Author(s):  
Ann Holbourn ◽  
Wolfgang Kuhnt ◽  
Michael Schulz
Keyword(s):  
High Resolution ◽  
Stable Isotope ◽  
Climate Variability ◽  
Middle Miocene ◽  
Western Pacific ◽  
Tropical Western Pacific

scholarly journals Interannual climate variability in the Miocene: High resolution trace element and stable isotope ratios in giant clams

2011 ◽  
Vol 306 (1-2) ◽  
pp. 75-81 ◽  
Author(s):  
Sietske J. Batenburg ◽  
Gert-Jan Reichart ◽  
Tom Jilbert ◽  
Max Janse ◽  
Frank P. Wesselingh ◽  
...  
Keyword(s):  
High Resolution ◽  
Stable Isotope ◽  
Climate Variability ◽  
Trace Element ◽  
Isotope Ratios ◽  
Stable Isotope Ratios ◽  
Giant Clams ◽  
Interannual Climate Variability

scholarly journals LC–MS/MS Analysis of Ciguatoxins Revealing the Regional and Species Distinction of Fish in the Tropical Western Pacific

2021 ◽  
Vol 9 (3) ◽  
pp. 299 ◽  
Author(s):  
Naomasa Oshiro ◽  
Takumi Tomikawa ◽  
Kyoko Kuniyoshi ◽  
Akira Ishikawa ◽  
Hajime Toyofuku ◽  
...  
Keyword(s):  
Fish Species ◽  
The Philippines ◽  
Western Pacific ◽  
Tropical Region ◽  
Northern Coast ◽  
Coastal Regions ◽  
Main Island ◽  
Tropical Western Pacific ◽  
The Pacific ◽  
Fish Samples

Ciguatera fish poisoning (CFP) is one of the most frequently reported seafood poisoning diseases. It is endemic to the tropical region and occurs most commonly in the regions around the Pacific Ocean, Indian Ocean, and Caribbean Sea. The principal toxins causing CFP are ciguatoxins (CTXs). In the Pacific region, more than 20 analogs of CTXs have been identified to date. Based on their skeletal structures, they are classified into CTX1B-type and CTX3C-type toxins. We have previously reported species-specific and regional-specific toxin profiles. In this study, the levels and profiles of CTXs in fish present in the tropical western Pacific regions were analyzed using the liquid chromatography–tandem mass spectrometry (LC–MS/MS) technique. Forty-two fish specimens, belonging to the categories of snappers, groupers, Spanish mackerel, and moray eel, were purchased from various places such as Fiji, the Philippines, Thailand, and Taiwan. Only the fish captured from Fijian coastal waters contained detectable amounts of CTXs. The toxin levels in the fish species found along the coastal regions of the Viti Levu Island, the main island in Fiji, and the toxin profiles were significantly different from those of the fish species present in other coastal regions. The toxin levels and profiles varied among the different fish samples collected from different coastal areas. Based on the toxin levels and toxin profiles, the coast was demarcated into three zones. In Zone-1, which covers the northern coast of the main island and the regions of the Malake Island and Korovau, CTXs in fish were below the detection level. In Zone-2, CTX3C-type toxins were present in low levels in the fish. CTX1B-type and CTX3C-type toxins co-occurred in the fish present in Zone-3. The toxin profiles may have reflected the variation in Gambierdiscus spp.

scholarly journals Climate Variability in Central Europe during the Last 2500 Years Reconstructed from Four High-Resolution Multi-Proxy Speleothem Records

Geosciences ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 166
Author(s):  
Sarah Waltgenbach ◽  
Dana F. C. Riechelmann ◽  
Christoph Spötl ◽  
Klaus P. Jochum ◽  
Jens Fohlmeister ◽  
...  
Keyword(s):  
Trace Elements ◽  
High Resolution ◽  
Climate Variability ◽  
Little Ice Age ◽  
Medieval Warm Period ◽  
Warm Period ◽  
Ice Age ◽  
Cold Period ◽  
Cave System ◽  
Dark Ages

The Late Holocene was characterized by several centennial-scale climate oscillations including the Roman Warm Period, the Dark Ages Cold Period, the Medieval Warm Period and the Little Ice Age. The detection and investigation of such climate anomalies requires paleoclimate archives with an accurate chronology as well as a high temporal resolution. Here, we present 230Th/U-dated high-resolution multi-proxy records (δ13C, δ18O and trace elements) for the last 2500 years of four speleothems from Bunker Cave and the Herbstlabyrinth cave system in Germany. The multi-proxy data of all four speleothems show evidence of two warm and two cold phases during the last 2500 years, which coincide with the Roman Warm Period and the Medieval Warm Period, as well as the Dark Ages Cold Period and the Little Ice Age, respectively. During these four cold and warm periods, the δ18O and δ13C records of all four speleothems and the Mg concentration of the speleothems Bu4 (Bunker Cave) and TV1 (Herbstlabyrinth cave system) show common features and are thus interpreted to be related to past climate variability. Comparison with other paleoclimate records suggests a strong influence of the North Atlantic Oscillation at the two caves sites, which is reflected by warm and humid conditions during the Roman Warm Period and the Medieval Warm Period, and cold and dry climate during the Dark Ages Cold period and the Little Ice Age. The Mg records of speleothems Bu1 (Bunker Cave) and NG01 (Herbstlabyrinth) as well as the inconsistent patterns of Sr, Ba and P suggests that the processes controlling the abundance of these trace elements are dominated by site-specific effects rather than being related to supra-regional climate variability.

scholarly journals An observationally constrained evaluation of the oxidative capacity in the tropical western Pacific troposphere

2016 ◽  
Vol 121 (12) ◽  
pp. 7461-7488 ◽  
Author(s):  
Julie M. Nicely ◽  
Daniel C. Anderson ◽  
Timothy P. Canty ◽  
Ross J. Salawitch ◽  
Glenn M. Wolfe ◽  
...  
Keyword(s):  
Oxidative Capacity ◽  
Western Pacific ◽  
Tropical Western Pacific

Vertical cloud properties in the tropical western Pacific Ocean: Validation of the CCSR/NIES/FRCGC GCM by shipborne radar and lidar

2008 ◽  
Vol 113 (D24) ◽  
Author(s):  
Hajime Okamoto ◽  
Tomoaki Nishizawa ◽  
Toshihiko Takemura ◽  
Kaori Sato ◽  
Hiroshi Kumagai ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Western Pacific ◽  
Western Pacific Ocean ◽  
Cloud Properties ◽  
Tropical Western Pacific

scholarly journals What is the fate of detrained ice in the Tropical Western Pacific

2019 ◽  
Author(s):  
Blaž Gasparini ◽  
Philip Rasch ◽  
Dennis Hartmann ◽  
Casey Wall ◽  
Marina Duetsch
Keyword(s):  
Western Pacific ◽  
Tropical Western Pacific
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