So Jewitt and Luu carried
out two parallel surveys: they used the Palomar Observatory's Schmidt telescope equipped with conventional glass photographic plates to scan large areas
of the sky for the very faintest objects, while also watching a narrow field
of view in the
plane of the planets for rare but
slightly brighter objects using MIT's 1.3 - metre telescope fitted with a CCD.
This part
of the Algarve is also a magnet for fans
of adventure too, be it rambling along the rugged local coastline indicative
of the area, delving into the hidden caves
of the Rio Arade as part
of a dedicated boat tour, examining the unique rock formations and medieval fortresses which dot the region or — and if you're
slightly more adventurous / full throttle in your approach to European breaks — hurling yourself
out of a
plane and sky diving; which naturally affords you unbroken views
of Portimao and the entire outlying postcode or three.
To point
out just a couple
of things: — oceans warming slower (or cooling slower) than lands on long - time trends is absolutely normal, because water is more difficult both to warm or to cool (I mean, we require both a bigger heat flow and more time); at the contrary, I see as a non-sense theory (made by some serrist, but don't know who) that oceans are storing up heat, and that suddenly they will release such heat as a positive feedback: or the water warms than no heat can be considered ad «stored» (we have no phase change inside oceans, so no latent heat) or oceans begin to release heat but in the same time they have to cool (because they are losing heat); so, I don't feel strange that in last years land temperatures for some series (NCDC and GISS) can be heating up while oceans are
slightly cooling, but I feel strange that they are heating up so much to reverse global trend from
slightly negative / stable to
slightly positive; but, in the end, all this is not an evidence that lands» warming is led by UHI (but, this effect, I would not exclude it from having a small part in temperature trends for some regional area, but just small); both because, as writtend, it is normal to have waters warming slower than lands, and because lands» temperatures are often measured in a not so precise way (despite they continue to give us a global uncertainity in TT values which is barely the instrumental's one)-- but, to point
out, HadCRU and MSU
of last years (I mean always 2002 - 2006) follow much better waters» temperatures trend; — metropolis and larger cities temperature trends actually show an increase in UHI effect, but I think the sites are few, and the covered area is very small worldwide, so the global effect is very poor (but it still can be sensible for regional effects); but I would not run
out a small warming trend for airport measurements due mainly to three things: increasing jet
planes traffic, enlarging airports (then more buildings and more asphalt — if you follow motor sports, or simply live in a town / city, you will know how easy they get very warmer than air during day, and how much it can slow night - time cooling) and overall having airports nearer to cities (if not becoming an area inside the city after some decade
of hurban growth, e.g. Milan - Linate); — I found no point about UHI in towns and villages; you will tell me they are not large cities; but, in comparison with 20-40-60 years ago when they were «countryside», many small towns and villages have become part
of larger hurban areas (at least in Europe and Asia) so examining just larger cities would not be enough in my opinion to get a full view
of UHI effect (still remembering that it has a small global effect: we can say many matters are due to UHI instead
of GW, maybe even that a small part
of measured GW is due to UHI, and that GW measurements are not so precise to make us able to make good analisyses and predictions, but not that GW is due to UHI).