The Intergovernmental Professional Group of Climate Change from United Nations claimed that in XX century, the sea level rise 1,7 millimetres. In XXI century they are thinking that sea will rise lower than half metre comparing to its level in the 90’s. The information of Al Gore, ex vice president of USA, in which he said that sea will rise six metres in a not far future, predictions from IPCC seem as been also biased, according to studies from Harvard University. For this reason, this last group have just decided to start a new study with new methods.
In the last years the sea level has risen more than experts thought. This occurs due to the water warms at the same time it expands and mainly because of ice melt on the ground. Harvard group is studying all geographic factors which make sea rise, analysing satellite and tide data. This new study is a great advance for different authors, because lots of data show us how the sea were in the past and scientific community need updated information. From the last glacier period, sea increase 120 metres, until sea kept two millenniums ago. From this moment sea were in calm, until industrial revolution arrived and due to CO2, sea started to rise again.
In the original article is better explained why the information about raise of the sea level is unclear: By employing different methods, have concluded that GMSL (Global Mean Sea Level) rose over the twentieth century at a mean rate of 1.6 to 1.9 millimetres per year. Efforts to account for this rate by summing estimates of individual contributions from glacier and ice-sheet mass loss, ocean thermal expansion, and changes in land water storage fall significantly short in the period before 1990. The failure to close the budget of GMSL during this period has led to suggestions that several contributions may have been systematically underestimated. However, the extent to which the limitations of tide gauge analyses have affected estimates of the GMSL rate of change is unclear.
I have chosen this article because environment worries me. I think is our duty look after the Earth. In the article below you can see how human race is the responsible of the ice melt and for consequence, it’s also responsible of the sea level rise. It’s important to learn how control our activities, all of them we do and that causes damages for the environment, but also for all the animals and plants species that used to lived in this areas before we, the Human race, arrived.