• strict warning: Non-static method Pagination::getInstance() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/pagination/pagination.module on line 307.
  • strict warning: Only variables should be assigned by reference in /home/cliccasc/domains/cliccascienze.it/public_html/modules/pagination/pagination.module on line 307.
  • strict warning: Non-static method Pagination::getInstance() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/pagination/pagination.module on line 410.
  • strict warning: Only variables should be assigned by reference in /home/cliccasc/domains/cliccascienze.it/public_html/modules/pagination/pagination.module on line 410.
  • strict warning: Non-static method Pagination::getInstance() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/pagination/pagination.module on line 344.
  • strict warning: Only variables should be assigned by reference in /home/cliccasc/domains/cliccascienze.it/public_html/modules/pagination/pagination.module on line 344.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Declaration of views_handler_field::query() should be compatible with views_handler::query($group_by = false) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/handlers/views_handler_field.inc on line 1147.
  • strict warning: Declaration of content_handler_field::element_type() should be compatible with views_handler_field::element_type($none_supported = false, $default_empty = false, $inline = false) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/cck/includes/views/handlers/content_handler_field.inc on line 229.
  • strict warning: Declaration of views_handler_argument::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/handlers/views_handler_argument.inc on line 917.
  • strict warning: Declaration of views_handler_argument::query() should be compatible with views_handler::query($group_by = false) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/handlers/views_handler_argument.inc on line 917.
  • strict warning: Declaration of views_handler_sort::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/handlers/views_handler_sort.inc on line 165.
  • strict warning: Declaration of views_handler_sort::options_submit() should be compatible with views_handler::options_submit($form, &$form_state) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/handlers/views_handler_sort.inc on line 165.
  • strict warning: Declaration of views_handler_sort::query() should be compatible with views_handler::query($group_by = false) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/handlers/views_handler_sort.inc on line 165.
  • strict warning: Declaration of views_handler_filter::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/handlers/views_handler_filter.inc on line 587.
  • strict warning: Declaration of views_handler_filter::query() should be compatible with views_handler::query($group_by = false) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/handlers/views_handler_filter.inc on line 587.
  • strict warning: Declaration of views_handler_filter_node_status::operator_form() should be compatible with views_handler_filter::operator_form(&$form, &$form_state) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/modules/node/views_handler_filter_node_status.inc on line 13.
  • strict warning: Declaration of views_handler_area::query() should be compatible with views_handler::query($group_by = false) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/handlers/views_handler_area.inc on line 81.
  • strict warning: Declaration of views_handler_area_text::options_submit() should be compatible with views_handler::options_submit($form, &$form_state) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/handlers/views_handler_area_text.inc on line 121.
  • strict warning: Declaration of views_plugin_argument_validate::options_submit() should be compatible with views_plugin::options_submit($form, &$form_state) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/plugins/views_plugin_argument_validate.inc on line 87.
  • strict warning: Declaration of views_plugin_argument_validate_taxonomy_term::options_submit() should be compatible with views_plugin_argument_validate::options_submit(&$form, &$form_state) in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/modules/taxonomy/views_plugin_argument_validate_taxonomy_term.inc on line 165.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.
  • strict warning: Non-static method view::load() should not be called statically in /home/cliccasc/domains/cliccascienze.it/public_html/modules/views/views.module on line 1113.

Pressione Normale

La pressione atmosferica normale o standard è quella misurata alla latitudine di 45°, al livello del mare e ad una temperatura di 15 °C, che corrisponde ad una colonna di mercurio di 760 mm. Nelle altre unità di misura corrisponde a:
1 atm = 760 mm Hg = 760 torr = 101 325 Pa = 1 013,25 mbar.
Con la diffusione dell'uso del Sistema internazionale anche in ambito meteorologico, la pressione atmosferica si misura in ettopascal (centinaia di Pascal) il cui simbolo è hPa. Dal momento che 1013,25 mbar = 101 325 Pa = 1013,25 hPa, si ha un'identità tra l'ettopascal ed il millibar.

Variazione della pressione con l'altitudine
A causa della comprimibilità dell'aria sotto il proprio peso la diminuzione della pressione atmosferica con la quota sul livello del mare non è lineare come nei liquidi, ma diminuisce in modo esponenziale. Vari fattori come le condizioni atmosferiche e la latitudine influenzano il suo valore, la NASA ha compilato valori medi per tutte le parti del mondo.

Variazione della pressione con la temperatura
La pressione atmosferica è influenzata dalla temperatura dell'aria. Essa diminuisce con l'aumentare della temperatura poiché l'atmosfera, riscaldandosi, tende a dilatarsi diventando meno densa e più leggera a parità di volume occupato. Di conseguenza il minore peso della massa d'aria calda riduce la pressione della colonna d'aria e si avrà una più bassa pressione atmosferica rispetto alle ore precedenti. Al contrario, quando l'aria si raffredda aumenta la propria densità ed il maggiore peso della massa d'aria aumenterà la pressione atmosferica.

Variazione della pressione con l'umidità
Anche l'umidità ambientale influenza la variazione della pressione atmosferica. Quando nell'aria aumenta la presenza di particelle di vapore acqueo vuol dire che in un dato volume d'aria questa maggiore quantità di particelle d'acqua avrà sostituito altri elementi più pesanti come azoto o ossigeno.