[新聞] PHILLIES/YANKEES GAMES THIS WEEKEND …

看板NY-Yankees作者leddy (耿秋)時間15年前 (2009/05/25 01:30)推噓15(15推 0噓 3→)

留言18則, 16人參與討論串1/1

這次費城人和洋基隊的系列賽對於全壘打理論很關鍵 Updated: Sunday, May 24, 2009 11:44 AM AccuWeather.com就天氣是否影響洋基球場全壘打的數量作了延伸的研究。AccuWeather 決定用這個假日洋基與費城人的比賽，來協助瞭解這個夏天洋基球場是否變成全壘打比賽的場地，因為天氣的預測紐約城將是典型的夏日氣候，溫暖有一點溼度的天氣。 AccuWeather的研究顯示洋基球場天氣的狀況干擾了場內全壘打的數目。風實際已經不是影響的因素，由於大部份的比賽風不是一直都很強勁。在大部份的球賽裡，風速是在每小時10英哩以下，風向也不是穩定地影響打向右外野的全壘打。假如可以使用理想的棒球的話，在一定的溫度和溼度下，就棒球飛行的法則而言，全壘打的數目應該會下降。由棒球飛行的法則來說，在溫暖潮溼的天氣下棒球在空中飛行的距離會比較遠。暖溼時的空氣比起乾冷的空氣較不濃密。空氣濃密時對棒球的阻力會比較不濃密的空氣要高。例如，紐約下午典型的溫暖潮溼的天氣，一般而言意味著將比四月涼爽的午後更有利於揮出全壘打。　　根據AccuWeather.com的氣象學者Mike Pigott的看法，如果是在使用的是一個理想或彈性的棒球前提下，這個理論是行得通的。但實際上，所用的棒球不是理想性的，棒球會吸收空氣中的分子，諸如棒球周圍的水蒸汽。溼度會影響棒球的彈性，假如棒球在球賽前是放在潮溼的環境中，那在球賽中會讓球和球棒碰撞後飛行的距離降低。　　　　換言之，球飛出球棒的角度，以及球飛行的距離，受到球從周遭的環境吸收多少水氣的影響。所以球在特定環境飛行的距離涉及許多物理學的法則，這也讓判定飛行的距離變得相當複雜。但是，AccuWeather.com研究的結果顯示目前大部份打出全壘打的球賽，溫度是在54到 69度之間。少量的球賽是在70幾度，且是乾燥的天氣。目前所有的球賽，比尚未到來的溫暖潮溼的天氣，空氣都要濃密得多。資料更新: 週六下午的球賽，費城人和洋基各打出兩隻全壘打。溫度是從70出頭下降到65 度左右。溼度則是中等。　　我們可以從天氣的資料歸結出，這個夏天全壘打的數量將會上昇。AccuWeather.com 已經預測這個夏天紐約城地區會有高於平常的溼度，這意味著洋基球場會持續成為全壘打的競賽場。新洋基球場的全壘打飇昇的原因仍然有些爭論，但一件事是確定的，天氣不是影響全全壘打數目飇昇唯一的原因。可能影響的還有場地的方位，外野牆的高度，打者的好壞，及投手的好壞等。後記: 看來這個夏天，洋基球場全壘打滿天飛的情況還會更加嚴重。 http://www.accuweather.com/news-story.asp?article=10 AccuWeather News Headlines PHILLIES/YANKEES GAMES THIS WEEKEND CRITICAL TO HOME RUN THEORY Updated: Sunday, May 24, 2009 11:44 AM UPDATE: 4 HOME RUNS HIT DURING SATURDAY AFTERNOON'S GAME By Henry Margusity AccuWeather.com AccuWeather.com has done extensive research into whether the weather is playing a role in the number of home runs at the new Yankee Stadium. We have determined that this weekend's games with the Phillies will help determine the outcome of this summer's home run derby at Yankee Stadium because the forecast is for warm and a little more humid weather, typical summer weather for New York City. Our findings show that the weather conditions at Yankee Stadium oppose the number of home runs being hit at the stadium. Winds really have not been a factor, given that in most games, winds were not all that strong. In most games, winds were under 10 mph, and the direction of the wind was not consistent with the right field home run theory. In respect to the temperature and humidity, and the laws of baseball flight, the number of home runs should be down, assuming the use of an ideal baseball. The laws of baseball flight say that a baseball will fly a longer distance in air that is warm and humid. Air that is warm and humid is considerably less dense than air that is cool and dry. The resistance on a baseball is greater in dense air than less-dense air. For example, a typical warm and humid New York evening would generally mean a better chance for home runs than, say, the cool evenings of April. According to AccuWeather.com Meteorologist Mike Pigott, this theory works if you assume an ideal, or elastic, baseball is being used. In reality, baseballs tend to not be ideal, as they absorb atmospheric constituents, such as water vapor, of their surrounding environment. Humidity affects the elasticity of a baseball, making it less likely to travel as far after collision with a bat if the ball has been sitting in a humid environment prior to the game. In other words, the degree to which a ball will fly off the bat and ultimately how far that ball will travel is influenced by how much moisture that ball has absorbed from its surroundings. Thus there is a great deal of physics behind the distance that a ball will travel in a particular environment that makes this determination quite complicated! However, AccuWeather.com's findings have shown that most of games where home runs where hit, the temperatures were between 54 and 69 degrees. The few games where the temperatures were in the 70s, the air was dry in those games. In all games, the air overall was dense compared to the warm, humid air that is yet to come. UPDATE: Saturday afternoon's game featured 2 home runs by the Phillies and 2 for the Yankees. Temperatures were in the low 70s falling to the middle 60s. Humidity levels were moderate. We can conclude from the weather data that the number of home runs should go up this summer. AccuWeather.com is already predicting higher-than-normal humidity in the New York City area this summer, which means the home run derby should continue at Yankee Stadium. The reason for the number of home runs at the new Yankee Stadium is still out for debate, but one thing is sure, the weather may not be the entire factor. Maybe it is due to the dimensions of the field, the height of the fences in the outfield, the quality of hitters, or the quality of the pitching (or lack thereof). -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.225.150.85 ※ 編輯: leddy 來自: 61.225.150.85 (05/25 01:31)

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