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Annual Report and Accounts 2006/7 - CEDA Repository

Annual Report and Accounts 2006/7 - CEDA Repository

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12 13 Management commentary<br />

Water shortages<br />

Overall, it was the wettest May in Engl<strong>and</strong><br />

<strong>and</strong> Wales for more than quarter of a<br />

century although the above-average<br />

rainfall was not enough to remedy water<br />

shortages particularly across south-east<br />

<strong>and</strong> central southern Engl<strong>and</strong> following<br />

two consecutive dry winters. As summer<br />

<strong>2006</strong> got underway the Environment<br />

Agency, working closely with the Met<br />

Office, grew increasingly concerned<br />

about public water supplies in Kent,<br />

Sussex <strong>and</strong> London. By the end of the<br />

month, Drought Orders <strong>and</strong> hosepipe<br />

bans had already been imposed in some<br />

areas, while the rest of the country was<br />

advised to watch the amount of water<br />

it used.<br />

Ensemble forecasting<br />

When expensive actions depend on a<br />

forecast, it is important to know its<br />

uncertainty. The Met Office ensemble<br />

forecasting system (MOGREPS) was<br />

developed to provide uncertainty<br />

estimates for short-range forecasts.<br />

Instead of running just a single forecast,<br />

the model is run a number of times from<br />

slightly different starting conditions to<br />

take account of the chaotic nature of the<br />

atmosphere. On some days, the forecasts<br />

from different ensemble members are all<br />

quite similar, which gives us confidence<br />

that we can issue a reliable forecast. On<br />

others, the members can differ widely<br />

<strong>and</strong> we have to be more cautious. An<br />

extended 15-day ensemble was<br />

implemented this month as part of the<br />

World Meteorological Organization’s<br />

THORPEX research programme to<br />

investigate whether a multi-model<br />

ensemble can extend skilful weather<br />

forecasting two weeks ahead.<br />

Aviation seminar<br />

A successful half-day aviation customer<br />

seminar was held at Heathrow, London<br />

this month. It was attended by 30<br />

delegates representing various airlines,<br />

the British Airports Authority <strong>and</strong> our<br />

flight briefing partner, SITA. Presentations<br />

were given on subjects as wide-ranging<br />

as probability forecasting, centralising<br />

production <strong>and</strong> forecasting at Heathrow,<br />

as well as an overview of Met Office<br />

services to civil aviation. There was an<br />

opportunity for discussion, product<br />

demonstration <strong>and</strong> feedback, which was<br />

positive <strong>and</strong> encouraging.<br />

Arctic adventurers<br />

When British adventurers the Arctic Foxes<br />

set out to become the first all-female team<br />

to cross the Greenl<strong>and</strong> ice-cap they<br />

sought Met Office help in getting there<br />

<strong>and</strong> back again safely <strong>and</strong> in record time.<br />

The Foxes reported that speaking to our<br />

forecasters each day was one of the<br />

highlights of their successful expedition.<br />

National treasure<br />

The National Meteorological Library holds<br />

one of the world’s finest collections of<br />

weather <strong>and</strong> climate resources. The<br />

Library is open to visitors five days a<br />

week, but also offers a free national<br />

enquiry service for weather-related<br />

topics. It recently launched a<br />

comprehensive online subject index that<br />

now makes it much easier for users to find<br />

key information from within the Library<br />

catalogue. As a result, helped by the<br />

Library, this wealth of resources is more<br />

visible, accessible <strong>and</strong> useful to the<br />

nation.

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