Juan C Garcia

Tanta construcción pone en peligro la vialidad hídrica de la ZMVM e incrementa el gran congestionamiento vial, gran generador de gases invernadero y por lo mismo, promotor de la crisis climática. ¿Dónde está la planeación urbana en México? youtu.be/xtwb6LLKxfg

Hoy quiero compartir preocupación muy grande relacionada con la gestión de riesgos de desastre, (sobre todo escenarios de riesgos futuros) en mi ciudad, la #CDMX: el paso del Programa General de Ordenamiento Territorial (PGOT) por el @Congreso_CdMex. Abro 🧵

El Nino is getting most of the media attention, but IMO the ocean heatwaves elsewhere will also be messing with weather patterns in coming months. Note those dark red colors are 9 deg F above average, which is an absurd amount of ocean warming 😳

Carbon dioxide (CO₂) averaged about 420 ppm in August 2023 10 years ago August averaged about 395 ppm + Preliminary data (@NOAA_ESRL): gml.noaa.gov/ccgg/trends/

The extent of global sea ice cover remains record small for this time of year. Both poles are unusually low, but the largest departure is currently coming from the extreme event in the Antarctic. More global visuals at zacklabe.com/global-sea-ice…

Para tener presente: Hacer un corredor de transporte público estructurado requiere de una serie de estudios. Como ejemplo comparto información del proyecto Metrobús "Línea Cero" 🚌 Incluye 📥bit.ly/3PzEJO3 📢Estudio de oferta y demanda de TP 📢Análisis costo beneficio 📢Estudio geométrico Realizar los estudios no es una garantía de que el proyecto se ponga en marcha. Es decir, no son solo los estudios… se requiere de presupuesto, permisos, tiempo para negociación y consenso entre los grupos involucrados, personal capacitado y profesionalizado en la materia, entre otros. Una vez autorizado el proyecto ahora se requieren de otras previsiones. ¿Cuáles tienen presentes?

The giant sequoia tree pictured was a magnificent specimen that had an estimated age of 2600 years at the time of its unfortunate felling in the 1890s. Giant sequoias (scientifically known as Sequoiadendron giganteum) are among the largest and longest-living trees on Earth, and their existence spans several millennia. They are native to the western slopes of the Sierra Nevada mountain range in California, USA. During the late 19th century, the logging industry experienced a significant boom in the United States, driven by the high demand for timber to support expanding cities and infrastructure projects. This period coincided with the industrial revolution, which led to an increased need for lumber. The immense size and durability of giant sequoias made them particularly sought after, and sadly, many of these ancient trees were felled during this time. The cutting down of the 2600-year-old giant sequoia tree in the 1890s represents a tragic loss of natural heritage and a poignant reminder of the environmental impact caused by human activities. Today, there are efforts to protect and preserve the remaining giant sequoias, as they hold immense ecological value and are regarded as national treasures in the United States.

Has this ever happened before? 🌊🌡️📈Record high Sea Surface Temperatures 🌍🌡️📈Record high global air temperatures 🧊➡️🌊Record low global sea-ice extent All happening for the same day, May 23rd 2023. Normally heat flows around the planet and not all records break at once..

Why (Northern Hemisphere mid latitude) ocean warming matters: twitter.com/LeonSimons8/st…

Triste ver cómo se está calentando el Océano Atlántico en el Hemisferio Norte.

The alarming anomaly in #Antarctic sea-ice extent continues to increase. But there's something even more extraordinary going on... (a short thread) Graphic: Phil Reid, @BOM_au

The whole North Atlantic Sea Surface Temperature is now 0.4°C higher than ever for this date. Because it takes >3000 times as much energy to heat water than air, this is an enormous increase.

Using two telescopes and over 280,000 individual photos, I captured my most detailed image of our moon. The full size is over a gigapixel. Trust me, you’ll want to zoom in on this one.

Nearly the entire #Arctic Ocean ice edge observed below average sea ice in March 2023. One exception was found in the Greenland Sea (Fram Strait), where a northerly flow contributed to anomalous ice export. [Data from @NSIDC. Sea ice concentration = fraction of ice-cover]

@GretaThunberg @LarryTheProto Right as usual. Both together. Plus the fact that the Keeling Curve, the inexorable rise in atmospheric CO2, is essentially unknown to the vast majority of humanity. keelingcurve.ucsd.edu

My time in Antarctica has come to an end. An important message, please read ❄️👇🏻 🧵1/n

#Arctic air temperature rank by month over the satellite era - now updated through February 2023 + Ranks: 1=warmest (red), 44/45=coldest (blue) + Download visual: zacklabe.com/arctic-tempera…

Rising global sea level... 🌊 The latest satellite altimetry data has just been processed through November 2022 by @NASAClimate. Graphic available at zacklabe.com/climate-change… (dashed line is not linear).

@JAL495588 I have more graphs of sea ice at zacklabe.com/antarctic-sea-…. And here is a graph of ice mass loss on the ice sheet: twitter.com/ZLabe/status/1…

#Antarctic sea-ice area is easily the *lowest* on record for today's date...

Changes in November #Arctic sea ice volume since the year 1901 - I've now decided to permanently add this to my thickness/volume page for some pre-1979 perspective 😉 It will be updated the first week of each month at zacklabe.com/arctic-sea-ice….