Climate change is characterized by global surface warming associated with the increase of greenhouse gas population since start industrial era. Growing evidence shows that upper atmosphere experiencing appreciable cooling over last several decades. The seminal modeling study Roble and Dickinson (1989) suggested potential effects increased gases on ionosphere thermosphere which appear consistent...

The Japan Oceanographic Data Center has been submitting oceanographic data to the World Data Center)for oceanography through the framework of the International Oceanographic Data and Information Exchange committee sponsored by the UNESCO/IOC. In the World Ocean Database 2009 which is the compiled database of WDC for oceanography, the Japanese contribution has reached about 16% of the total. Jap...

99Tc levels were measured in seawater samples collected between 2000 and 2002 in the West Spitsbergen Current (WSC) and along the western coast of Svalbard or Spitzbergen and compared with available oceanographic 3-D modelling results for the late 1990s. Additional data from related regions are also presented in order to support the data interpretation. The seawater in the Arctic fjord Kongsfjo...

High-frequency (HF) surface wave radars provide a unique capability to detect targets far beyond the conventional microwave radar coverage but also could contribute to the development and improvement of Tsunami Early Warning Systems. The HF radar system WERA is an oceanographic radar placed at the coast and providing simultaneous wide area measurements of ocean surface current fields and sea st...