774 MONTHLY WEATHER REVIEW vola 98, No. 10 PICTURE OF THE UD C 551.6 07.362.2: 561.46.027(084.1) (269.46) (99) "1960"

• Main Authors: Ruben Nasba, Roland Nawratol
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Amery; Antarctic; Argentine; Belgrano; General Belgrano; The Antarctic; Antarc*; Iceberg*
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.2116; http://docs.lib.noaa.gov/rescue/mwr/098/mwr-098-10-0774.pdf

Swithir,,ank (1969) mentions the drifting of two great icebergs, possibly detached from the Amery Barrier (73 ' E.) at the end of 1963 and seen along the Antarctic coast between 15 ' and 20 ' W. in January 1968 (fig. 1). During the Argentine Navy Antarctic campaign in the summer of 196811969, thc icebreaker BRA Qeneral San Mcwtin met with serious difficulties in furnishing supplies to Base General Belgrano (77'58 ' S., 3S04S ' W.) due to the presence of two large icebergs in Duke Ernest Bay (figs. 2 and 3). Thesc icebcrgs may be the same as those identified in the ESSA '7 picture on Feb. '7, 1969 (fig. 4), and also on Feb. 8, 1969. Months later, AFT images from Nimbus 3 received at Base Aeronaval Rio Qallegos (51'38 ' S., 69'13 ' W.) and AVCS photography from ESSA 9 of October 1969 (fig. 5) shoved a dark northeast-southmest-oriented patch about 11 km wide and 80 km long in thc eastern part of Duke Ernest Bay. This pate_- is assumed to be asmallwater lead associated with an iceberg nearby to the north and having similar dimensions-observe the hummockcd appcarance (A) in figure 5. This water lead with thc brighter northcrn border differs notably in appearance from other known ice-free watcrs-sce (B) in figure 5. The patch at (A) appears clear on thosc days with very little or no cloudiness at Base General Belgrano, ruling out thc hypothesis that these are clouds (table 1). Note in figure 5 that the iceberg in qucstion has a relative position rotated 90 " around its southern end, possibly aground, with respect to the position observed in figure 4. This agrees with the observation illustrated in figure 2. Duo to the natural erosion suffered by the aforementioned iceberg, its tracking has become very dficult