Opinion Editorials

T-MOSAiC—A new circumpolar collaboration 357
Diogo FOLHAS, João CANÁRIO & Warwick F. VINCENT

The importance of long-term research and monitoring in the Ross Sea 359
Bob ZUUR

Review

Newly established autonomous adaptive low-power instrument platform (AAL-PIP) chain on East Antarctic Plateau and operation 362
Zhonghua XU, Michael D. HARTINGER, Robert CLAUER, Daniel WEIMER, Kshitija DESHPANDE, Hyomin KIM, Stephen MUSKO, Anna WILLER, Thomas EDWARDS, Shane COYLE, Yuxiang PENG, Dong LIN & John BOWMAN

Articles

Very low biodiversity of top predators—seabirds and marine mammals—in the high Arctic Ocean 375
Claude R. JOIRIS

Methane increase over the Barents and Kara seas after the autumn pycnocline breakdown: satellite observations 382
Leonid YURGANOV, Frank MULLER-KARGER & Ira LEIFER

On the determination and simulation of seawater freezing point temperature under high pressure 391
YAN Liangjun, WANG Zhaomin, LIU Chengyan & WU Yang

Estimation of ice resistance and sensitivity analysis for an icebreaker 399
FAN Tao, YU Chenfang & JIANG Yongxu

Letter

Anomalous extensive landfast sea ice in the vicinity of Inexpressible Island, Antarctica 406
ZHAI Mengxi, ZHAO Tiancheng, HUI Fengming, CHENG Xiao, LIU Aobo, YUAN Jiawei, YU Yining & DING Yifan

Contents of Volume 30, 2019

Cover picture: This is the temporary campsite during the installation of the autonomous low power space weather monitoring system on the East Antarctic Plateau. The closest support is over 800 kilometers away from the South Pole Station (paper by Xu Z H, et al., page 362).