Essential Science Indicators provides citation rankings of scientists, institutions, countries, and journals broken out by broad fields of science. A citation threshold is applied to each field ranking: scientists and institutions are selected if they are in the top 1% by total citations in a given field, and countries and journals must be in the top 50%. A total of 10 years of Thomson Scientific citation data, plus some number of consecutive bimonthly periods during the current year, are used to determine the rankings. Since Essential Science Indicators is updated every two months, it is possible to identify new entrants to the rankings, i.e., those scientists, institutions, countries, and journals appearing for the first time in a field ranking. The information found in the links below provide information on the most-cited of these new entrants in each field, for the most recent bimonthly update, and for earlier updates as well.

Choose the month you would like to view:

2007
December 2007	October 2007	August 2007
June 2007	April 2007	February 2007
2006
December 2006	October 2006	August 2006
June 2006	April 2006	February 2006
2005
December 2005	October 2005	August 2005
June 2005	April 2005	February 2005
2004
December 2004	October 2004	August 2004
June 2004	April 2004	February 2004
2003
December 2003	October 2003	August 2003
June 2003	April 2003	February 2003
2002
December 2002	October 2002	August 2002
June 2002	April 2002	February 2002
2001
December 2001	October 2001	September 2001

---

For details on citation scores, papers, and time-series performance for these new entrants, see Essential Science Indicators from Thomson Scientific.