• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic; Greenland; Norwegian Sea; Greenland Sea; Iceland; North Atlantic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.6166; http://faculty.nps.edu/pcchu/web_paper/elsevier/fractal.pdf

oceanic convection are taken to be the individual plumes, clusters of plumes or called chimneys, and eddies that are the In July–August 1987, fine-resolution temperature data are collected on board of M/V SEA SEACHER by the Royal Navys Admiralty Research Establishment (ARE) using a digital thermistor chain (280 m long, 100 sensor pods) with a single 200 km straight-line tow (4 knots speed) near 69 N, 18 W (Fig. 2) in the east edge of EGC [3]. The upper ocean (surface to 280 m depth) was sampled every 0.9 s, obtaining a temperature profile about every 2 m along the track. Eachsensor pod of the chain measures temperature, and about one in five also measures pressure, allowing the depth distribution of temperature to be deduced.consequence of chimneys aging in a rotating frame. Two major features, nonstationarity and intermittency, should be first investigated in order to understand oceanic convective process or the secondary circulation across oceanic fronts [2]. Question arises: How can we determine upper ocean nonstationarity and intermittency from observational data? This paper describes a multi-fractal analysis on a high-resolution temperature dataset to obtain the nonstationarity and intermittency of the upper layer (300 m depth) in the southwestern GIN Sea. 2. Thermistor chain dataThe Greenland Sea, Iceland Sea, and Norwegian Sea (GIN Sea) are key regions in the advective–convective system with various stages of modification that links the polar ocean with the North Atlantic (Fig. 1). Because of the import and modification of water masses a large number of regional water types can be encountered. The North Atlantic Water (NAW) is relatively warmer and saline (T> 2 C, S> 34:9 ppt). The Arctic Water (AW) is cooler and fresher (T < 0 C, S < 34:7 ppt) [1]. Different water masses encountered in the GIN Sea interface and form fronts and eddies that not