I say the sun rises in the east and sets in the west because, from
an observational perspective, that is correct.
I think we have now a much better understanding from
an observational perspective and again theoretical modeling is becoming much more sophisticated, and although there is [are] still lots of puzzles involved and lots of, you know, healthy scientific debates, which what makes the subject very interesting at this time.
Taking accurate measurements of lithium - 6 and lithium - 7 in old stars is extremely challenging, both from a theoretical and
observational perspective, in particular for lithium - 6, because being the less abundant isotope of lithium, its signature is very weak.
Those are really challenging things to improve from
an observational perspective — and require immense computer power.
He's coming at it from
an observational perspective.
Chan and Liu (2004), Global Warming and Western North Pacific Typhoon Activity from
an Observational Perspective, J.Clim., 17, 4590 - 4602
Both from a theoretical and
observational perspective, for large tilt angles, i.e. around solar maxima, GCR particles of all energies experience larger modulation during negative polarity epochs comparing to positive polarity epochs.
From
an observational perspective then, key issues are the tropical storm formation regions, the frequency, intensity, duration and tracks of tropical storms, and associated precipitation.
Other useful information, and
an observational perspective, can be found in the following references.
The reconstruction could also help understand SAMOC variability from interannual to decadal timescales and its impacts on atmospheric circulation, climate, and extreme weather from
an observational perspective.