Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search


NIWA’s Sea Surface Temperature Update

NIWA’s Sea Surface Temperature Update

A fortnightly report, updated over summer, covering sea surface temperatures and anomalies (differences from average) around New Zealand. Following the Tasman Sea marine heatwave event of 2017-18, this report will help users understand the latest conditions in the ocean and their expected changes over the upcoming weeks.

Recent Sea Surface Temperatures and Anomalies

Over the past two weeks, the average sea surface temperature (SST) anomaly in the New Zealand region (as above) was 0.74°C above the long-term 1981-2010 average. SSTs are much warmer than average around the South Island and to the west, south, and east of the country. Meanwhile, SSTs are closer to average near Northland and more broadly to the north of the country. While SSTs are generally warmer than average, they are markedly cooler than this time last year when a marine heatwave event was underway.

Expected Conditions over the Next Several Weeks

The change in SST over time is linked to circulations in both the atmosphere and ocean. From this weekend into early next week, a large ridge of high pressure is expected to bring above average air temperatures and sunshine to the New Zealand region, which will likely lead to some short-term SST warming. After a brief unsettled, cooler period, higher pressure than normal is favoured over the Tasman Sea from late December into early January, which may encourage additional warming. Generally speaking, SST anomalies are expected to be similar or warmer over the coming weeks.

Sea Surface Temperature Update is a fortnightly report for New Zealand media. It provides measurements of sea surface temperature and anomalies (differences from average) measurements for New Zealand coastal and Tasman Sea waters.

Sea surface temperature anomaly: the difference between the long-term (1981-2010) average sea surface temperature and current sea surface temperature for a given time of year.

New Zealand region: within this document it refers to the ocean region bounded by the coordinates (145°E-175°W, 25-55°S)

SST: abbreviation for sea surface temperature.

Marine heatwave: periods of extremely warm sea surface temperature that persists for a prolonged period of time and can extend up to thousands of kilometres.

© Scoop Media

Business Headlines | Sci-Tech Headlines


Survey: NZ's Appetite For Eating Insects

When it comes to eating insects, New Zealanders like them crunchy and if given a choice would opt to eat a black field cricket before other creepy-crawlies, according to a new AgResearch report that explores the nation’s appetite for insects. More>>


Sweden Crash: CAA Grounds 21 Aircraft Over Safety Concerns

The Director of Civil Aviation Graeme Harris, has today, Saturday 20 July, 2019 suspended the airworthiness certificates of all 21 Gippsland GA8 Airvan aircraft currently operating in New Zealand. More>>


Emission Statement: No New Coal Boilers For Fonterra

Fonterra is shaving eleven years off its coal target, as it announces a new commitment to reduce its reliance on coal. More>>


Long Time Coming: Soil Turned On Waimea Dam

After almost 20 years of planning and a 'gruelling' process to keep the project on track, the Waimea Community Dam, one of the Tasman District's largest-ever projects, is now under way. More>>