Why does New Zealand need both MetService and NIWA?

A very good “STUFF” Editorial I missed a year ago.
I often comment on NZ weather and climate issues but getting hold of basic data and map presentations as can be easily found for Australia at the BoM www site – is time consuming and near impossible for NZ. As STUFF says “We believe public weather data should be just that – public.” Amen to that.
In terms of normal weather forecasting NZ could probably get rid of much of their duplicated structure (MetServiceNIWA) and use the COLA maps www feed from New York.

Blenheim monthly temperature trends show classic urban heat island (UHI) signal

Warming trends showing up strongest in the cooler months. Data is from a Govt fruit research institute the Marlborough Research Centre on the town outskirts. Charts by the MRC. Blenheim population growth. Small town temperature data – often classed as “rural” in global databases – can usually be shown to be riddled with UHI warming.

Click for monthly charts – January — February —March —April—MayJune—July—August—September—October—November—December
Here are the monthly trends in degrees C as per MRC.
Trends 1932 to 2011 or 2012.
Jan ~0.4
Feb -0.06
Mar 0.25
Apr 0.23
May 1.84
Jun 2.03
Jul 1.78
Aug 1.83
Sep 1.28
Oct 0.71
Nov 0.37
Dec 0.02

Huge temperature data shambles at Hokitika Aerodrome

Instrument change a ~decade ago –

amazing nobody at GHCN has noticed this complete failure to calibrate the new instrument with what it replaced – data from KNMI Climate Explorer. Minimum affected too. This has historic significance because Hokitika was one of the “rural” series in Jones original global dataset in the 1980’s that had a ~century of data. Ruined for good now. I think the NZ Metservice runs the stations.

Updated chart AEMO wholesale electricity daily prices

For what it is worth there has been a divergence last month with SA, VIC and Tas reducing in price. NSW reducing a little and Qld now more expensive than NSW.

AEMO source data – AEMO NEM Dispatch OverviewNemWatch is useful as a snapshot of generation type and demand. There was more wind in September than August but October started with a wind-drought. Large vers chart

Primarily exposing faulty methodologies behind global temperature trend compilations