Si bajaran podría serlo, pero creo que mas para los escépticos.
No veo de donde puedes sacar tan peregrina idea. Ojalá las temperaturas pudieran mantenerse como el máximo de 1998, o incluso un par de grados más, como en el Medioevo, o en el Período Romano.
Las temperaturas más altas siempre han sido más beneficiosas para la humanidad, mientras que los períodos fríos lo fueron también de escasez, hambrunas, guerras y desolación.
Ejemplos y estudios al respecto abundan en la historia. Aquí te dejo un enlace a uno "recién salido del horno":
CLIMATE AND THE LATE BRONZE COLLAPSE IN THE SOUTHERN LEVANTAnother novelty in the current research is in the chronological correlation between the pollen results and two other records of the past. At the end of the Bronze Age many Eastern Mediterranean cities were assaulted and destroyed by fire. The dates of these events indeed fall between ca.1250-1100 BCE. The same holds true for ancient Near Eastern written documents that testify to severe droughts and famine in exactly the same period. Such documents are known from across the entire region from the Hittite capital in Anatolia in the north, via Ugarit on the Syrian coast and Aphek in Israel to Egypt in the south.
Reduction in precipitation in the “green” areas of the Near East should not be expected to cause the collapse of great empires. So what had happened? Prof. Ronny Ellenblum of the Hebrew University in Jerusalem studied written documents that describe similar conditions of severe droughts and famine in the 10th and 11th centuries CE. He showed that in the northern parts of the Near East, such as northern Iran and Anatolia, shrinkage in precipitation was accompanied by devastating cold spells that destroyed crops. Langgut, Finkelstein and Litt propose a similar process for the end of the Bronze Age: severe cold spells destroyed the crops in the northern parts of the ancient Near East and shrinkage in precipitation damaged agricultural output in the eastern steppe parts of the region.En realidad, a los escépticos nos preocupa especialmente que llegáramos incluso a mínimos como los de Pequeña Edad de Hielo, con sus inquietudes sociales, revoluciones, migraciones y hambre por todos lados. Especialmente teniendo en cuenta que toda esta tontería del calentamiento global antropogénico se está cargando la ciencia, la tecnología y el desarrollo económico.